https://docs.masst.dev/ai/agents https://res.cloudinary.com/ddg380vsg/image/upload/v1782287012/masst-docs/ai/agents/agents-vs-chains-vs-workflows-00005b.png Agents · Agents vs chains vs workflows · AI Engineering | MASST Docs Agents — Agents vs chains vs workflows: flowchart covering Incoming task, Path is known in advance?, Chain: one LLM call, fixed prompt template, Workflow: predefined graph of LLM… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/agents/loops-planning https://res.cloudinary.com/ddg380vsg/image/upload/v1782134771/masst-docs/ai/loops-planning-reflection/visual-the-canonical-agent-loop-00001c.png Loops, planning, reflection · Visual: the canonical agent loop · AI Engineering | MASST Docs Loops, planning, reflection — The canonical agent loop: flowchart covering User task arrives, Initialize: messages…, Step k: messages -> model, Model output?, Stop: return text to… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782134791/masst-docs/ai/loops-planning-reflection/decision-rule-00001a.png Loops, planning, reflection · Decision rule · AI Engineering | MASST Docs Loops, planning, reflection — Decision rule: flowchart covering Have a task, Path known in advance?, One LLM call — no loop, Chain / workflow — no loop, Subtasks well-defined and… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/agents/memory-state https://res.cloudinary.com/ddg380vsg/image/upload/v1782134805/masst-docs/ai/memory-state-management/the-three-kinds-of-memory-000076.png Memory & state management · The three kinds of memory · AI Engineering | MASST Docs Memory & state management — Three kinds of memory: flowchart covering Semantic memory — long-term facts, Episodic memory — past conversations, Working memory — this turn, System… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782134817/masst-docs/ai/memory-state-management/when-to-use-which-decision-rule-000001.png Memory & state management · When to use which (decision rule) · AI Engineering | MASST Docs Memory & state management — When to use which (decision rule): flowchart covering Building agent with memory, Sessions are self-contained?, Rolling summary only. No cross-session… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782134833/masst-docs/ai/memory-state-management/decision-rule-00000e.png Memory & state management · Decision rule · AI Engineering | MASST Docs Memory & state management — Decision rule: flowchart covering Adding memory to your agent, Do sessions span multiple visits?, Rolling summary only. Done., Is user identity… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/agents/tool-use https://res.cloudinary.com/ddg380vsg/image/upload/v1782134849/masst-docs/ai/tool-use-function-calling/visual-the-tool-use-round-trip-000035.png Tool use & function calling · Visual: the tool-use round trip · AI Engineering | MASST Docs Tool use & function calling — The tool-use round trip: flowchart covering User: 'Refund my last charge', Model receives: system prompt + tools + user msg, Model picks an action,… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782134861/masst-docs/ai/tool-use-function-calling/decision-rule-000037.png Tool use & function calling · Decision rule · AI Engineering | MASST Docs Tool use & function calling — Decision rule: flowchart covering Need the LLM to take an action?, Is the action always the same?, Skip tools — call the API directly from code, How… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/cost/caching-routing https://res.cloudinary.com/ddg380vsg/image/upload/v1782134866/masst-docs/ai/prompt-caching-model-routing-batching-semantic-ded/the-core-insight-000028.png Prompt caching, model routing, batching, semantic dedup · The core insight · AI Engineering | MASST Docs Prompt caching, model routing, batching, semantic dedup — Core insight: flowchart covering Don't pay for repeated work…, Total bill, Don't pay frontier prices for non-frontier… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782134877/masst-docs/ai/prompt-caching-model-routing-batching-semantic-ded/visual-the-full-cost-engineering-pipeline-00002b.png Prompt caching, model routing, batching, semantic dedup · Visual: the full cost-engineering pipeline · AI Engineering | MASST Docs Prompt caching, model routing, batching, semantic dedup — The full cost-engineering pipeline: flowchart covering Incoming request, Semantic cache hit, similarity theta?, Return… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782134895/masst-docs/ai/prompt-caching-model-routing-batching-semantic-ded/the-model-selection-decision-tree-000016.png Prompt caching, model routing, batching, semantic dedup · The model-selection decision tree · AI Engineering | MASST Docs Prompt caching, model routing, batching, semantic dedup — Model-selection decision tree: flowchart covering What's the task?, Haiku 4 Llama-3-8B gpt-4o-mini, Sonnet 4.5 gpt-4o… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782134911/masst-docs/ai/prompt-caching-model-routing-batching-semantic-ded/decision-rule-000078.png Prompt caching, model routing, batching, semantic dedup · Decision rule · AI Engineering | MASST Docs Prompt caching, model routing, batching, semantic dedup — Decision rule: flowchart covering Cost too high?, System prompt 1K tokens?, Step 1: Enable prompt caching Expected:… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/cost https://res.cloudinary.com/ddg380vsg/image/upload/v1782134925/masst-docs/ai/cost-engineering/the-80-20-where-the-money-actually-is-00000a.png Cost engineering · The 80/20: where the money actually is · AI Engineering | MASST Docs Cost engineering — 80/20: where the money actually is: flowchart covering Untuned bill: $1.00 baseline, Add prompt caching…, Bill: ~$0.25 to $0.40 60-75% reduction, Route by query… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782134930/masst-docs/ai/cost-engineering/how-to-think-about-it-a-mental-model-00007f.png Cost engineering · How to think about it — a mental model · AI Engineering | MASST Docs Cost engineering — How to think about it — a mental model: flowchart covering Each request, Does it need a frontier model?, Cheap model $0.15 to $0.80 per M input, Is the prefix… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/edges/browser-agents https://res.cloudinary.com/ddg380vsg/image/upload/v1782134938/masst-docs/ai/browser-agents/visual-the-screenshot-loop-000000.png Browser agents · Visual — the screenshot loop · AI Engineering | MASST Docs Browser agents — The screenshot loop: flowchart covering Task: 'find the cheapest flight', Capture screenshot…, Resize to model resolution…, Vision model: screenshot + task +… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782134957/masst-docs/ai/browser-agents/decision-rule-000032.png Browser agents · Decision rule · AI Engineering | MASST Docs Browser agents — Decision rule: flowchart covering Need to interact with a site?, Does the site have an API?, Use the API. Done., Is there an MCP server for it?, Use the MCP… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/edges/coding-agents https://res.cloudinary.com/ddg380vsg/image/upload/v1782134977/masst-docs/ai/coding-agents/visual-the-coding-agent-loop-000048.png Coding agents · Visual — the coding-agent loop · AI Engineering | MASST Docs Coding agents — The coding-agent loop: flowchart covering User task: 'fix the bug in auth.ts', Plan pass: list files to read, describe approach, Read tool: load auth.ts, tests,… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782287013/masst-docs/ai/coding-agents/decision-rule-00005d.png Coding agents · Decision rule · AI Engineering | MASST Docs Coding agents — Decision rule: flowchart covering Coding task?, Scope, Cursor Composer or Claude Code interactive, Claude Code with planning, manual diff review, Aider or Claude… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/edges/mcp https://res.cloudinary.com/ddg380vsg/image/upload/v1782135017/masst-docs/ai/model-context-protocol-mcp/visual-mcp-architecture-00002c.png Model Context Protocol (MCP) · Visual — MCP architecture · AI Engineering | MASST Docs Model Context Protocol (MCP) — MCP architecture: flowchart covering Host (Claude Code / Cursor / Claude Desktop / Cline), User, LLM…, MCP Client A, MCP Client B. Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135038/masst-docs/ai/model-context-protocol-mcp/decision-rule-000019.png Model Context Protocol (MCP) · Decision rule · AI Engineering | MASST Docs Model Context Protocol (MCP) — Decision rule: flowchart covering Building LLM tools?, Used across multiple hosts or by external users?, Use the host's native tool calling, Where… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/edges/sandboxed-execution https://res.cloudinary.com/ddg380vsg/image/upload/v1782135049/masst-docs/ai/sandboxed-code-execution/visual-the-sandbox-decision-space-000040.png Sandboxed code execution · Visual — the sandbox decision space · AI Engineering | MASST Docs Sandboxed code execution — The sandbox decision space: flowchart covering LLM-generated code…, Where to run it?, Firecracker microVM…, WASM / WebContainers…, Deno permissions /… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135063/masst-docs/ai/sandboxed-code-execution/decision-rule-00002c.png Sandboxed code execution · Decision rule · AI Engineering | MASST Docs Sandboxed code execution — Decision rule: flowchart covering Need to run model-generated code?, Where does it run?, WebContainers / Pyodide, Language requirements,… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/edges/voice https://res.cloudinary.com/ddg380vsg/image/upload/v1782135069/masst-docs/ai/voice-agents/the-problem-this-solves-000052.png Voice agents · The problem this solves · AI Engineering | MASST Docs Voice agents — Problem this solves: flowchart covering user stops speaking, VAD detects end-of-turn…, ASR finalizes transcript…, LLM produces first token…, TTS produces first… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135075/masst-docs/ai/voice-agents/visual-the-pipeline-vs-the-speech-to-speech-path-000079.png Voice agents · Visual — the pipeline vs the speech-to-speech path · AI Engineering | MASST Docs Voice agents — The pipeline vs the speech-to-speech path: flowchart covering Microphone audio…, VAD: end-of-turn detection, Deepgram / Whisper streaming partial + final… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782287014/masst-docs/ai/voice-agents/decision-rule-000072.png Voice agents · Decision rule · AI Engineering | MASST Docs Voice agents — Decision rule: flowchart covering Need voice?, Language well-supported by Realtime models?, Pipeline with regional TTS/STT, Need Claude-class reasoning or custom… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/eval https://res.cloudinary.com/ddg380vsg/image/upload/v1782135103/masst-docs/ai/eval-observability/visual-the-eval-pipeline-000007.png Eval & observability · Visual: the eval pipeline · AI Engineering | MASST Docs Eval & observability — The eval pipeline: flowchart covering Dev: vibe checks, 3-5 hand-written examples. Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135114/masst-docs/ai/eval-observability/level-4-continuous-online-eval-structured-trace-ob-000000.png Eval & observability · Level 4: continuous online eval + structured trace observability · AI Engineering | MASST Docs Eval & observability — Level 4: continuous online eval + structured trace observability: flowchart covering L1: Vibe checks, L2: Manual golden set, Google Sheet, L3: Automated… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782287016/masst-docs/ai/eval-observability/online-eval-production-sampling-000032.png Eval & observability · Online eval (production sampling) · AI Engineering | MASST Docs Eval & observability — Online eval (production sampling): flowchart covering Pull request, Deploy to prod, Sample 1-10% of prod requests, Page on-call, auto-rollback option, Add… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135150/masst-docs/ai/eval-observability/decision-rule-which-eval-to-build-first-000037.png Eval & observability · Decision rule: which eval to build first · AI Engineering | MASST Docs Eval & observability — Decision rule: which eval to build first: flowchart covering Where are you?, Stage, Vibe check. Write 10 examples in a text file., Manual golden set, 30-50… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/eval/llm-as-judge https://res.cloudinary.com/ddg380vsg/image/upload/v1782135169/masst-docs/ai/llm-as-judge-golden-sets-regression-suites/visual-the-eval-pipeline-000069.png LLM-as-judge, golden sets, regression suites · Visual: the eval pipeline · AI Engineering | MASST Docs LLM-as-judge, golden sets, regression suites — The eval pipeline: flowchart covering Golden set: 50-500 examples, JSON file in repo, Run system under test on each example…,… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782287016/masst-docs/ai/llm-as-judge-golden-sets-regression-suites/decision-rule-which-grader-for-which-dimension-00003b.png LLM-as-judge, golden sets, regression suites · Decision rule: which grader for which dimension · AI Engineering | MASST Docs LLM-as-judge, golden sets, regression suites — Decision rule: which grader for which dimension: flowchart covering What dimension are you grading?, Output type?, Code graders:… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/eval/observability https://res.cloudinary.com/ddg380vsg/image/upload/v1782135199/masst-docs/ai/traces-prompt-versioning-debugging/visual-a-single-llm-request-as-a-span-tree-000024.png Traces, prompt versioning, debugging · Visual: a single LLM request as a span tree · AI Engineering | MASST Docs Traces, prompt versioning, debugging — A single LLM request as a span tree: flowchart covering Root span: HTTP POST /api/chat user_id, request_id, latency, Span: retrieval query,… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135218/masst-docs/ai/traces-prompt-versioning-debugging/decision-rule-how-much-observability-does-my-syste-000061.png Traces, prompt versioning, debugging · Decision rule: how much observability does my system need? · AI Engineering | MASST Docs Traces, prompt versioning, debugging — Decision rule: how much observability does my system need?: flowchart covering Where are you?, Daily LLM calls?, OTel + hosted backend…. Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai https://res.cloudinary.com/ddg380vsg/image/upload/v1782287017/masst-docs/ai/ai-engineering/how-the-tiers-connect-00005e.png AI Engineering · How the tiers connect · AI Engineering | MASST Docs AI Engineering — How the tiers connect: flowchart covering Retrieval, Agents, Inference, Eval, Safety. Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/inference https://res.cloudinary.com/ddg380vsg/image/upload/v1782135247/masst-docs/ai/inference-internals/what-determines-throughput-vs-latency-000039.png Inference internals · What determines throughput vs latency · AI Engineering | MASST Docs Inference internals — What determines throughput vs latency: flowchart covering Incoming request, Prefill phase: process N input tokens in parallel…, Response stream, Time To… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135258/masst-docs/ai/inference-internals/the-inference-stack-at-a-glance-000015.png Inference internals · The inference stack at a glance · AI Engineering | MASST Docs Inference internals — Inference stack at a glance: flowchart covering User request, Load balancer / router, Serving layer…, Scheduler continuous batching + admission control, KV… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135267/masst-docs/ai/inference-internals/when-to-use-a-hosted-api-vs-self-host-00004f.png Inference internals · When to use a hosted API vs self-host · AI Engineering | MASST Docs Inference internals — When to use a hosted API vs self-host: flowchart covering Monthly token volume?, Hosted API…, Need OSS model or custom fine-tune?, Consistent traffic…,… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/inference/kv-cache-batching https://res.cloudinary.com/ddg380vsg/image/upload/v1782135272/masst-docs/ai/kv-cache-continuous-batching/the-core-insight-000023.png KV cache & continuous batching · The core insight · AI Engineering | MASST Docs KV cache & continuous batching — Core insight: flowchart covering Input: N tokens, PREFILL O…, Write KV cache: K,V for each of N tokens at every layer, DECODE…, d^2 + N*d. Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135278/masst-docs/ai/kv-cache-continuous-batching/visual-the-lifecycle-of-a-request-in-continuous-ba-00007f.png KV cache & continuous batching · Visual: the lifecycle of a request in continuous batching · AI Engineering | MASST Docs KV cache & continuous batching — The lifecycle of a request in continuous batching: flowchart covering Request arrives, Admission control: enough free KV slots?, Queue / reject,… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135284/masst-docs/ai/kv-cache-continuous-batching/5-speculative-decoding-000009.png KV cache & continuous batching · 5. Speculative decoding · AI Engineering | MASST Docs KV cache & continuous batching — Speculative decoding: flowchart covering Draft model…, Target model…, Compare draft to target's sampled tokens, Emit 4 tokens in 1 target forward… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135289/masst-docs/ai/kv-cache-continuous-batching/decision-rule-000034.png KV cache & continuous batching · Decision rule · AI Engineering | MASST Docs KV cache & continuous batching — Decision rule: flowchart covering Self-host inference?, Workload shape?, vLLM + prefix caching + chunked prefill + paged attention, TensorRT-LLM +… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/inference/quantization-serving https://res.cloudinary.com/ddg380vsg/image/upload/v1782135294/masst-docs/ai/quantization-speculative-decoding-serving/the-core-insight-000051.png Quantization, speculative decoding, serving · The core insight · AI Engineering | MASST Docs Quantization, speculative decoding, serving — Core insight: flowchart covering Weight bytes per param, HBM bandwidth limit, Decode tokens/sec, HBM memory pressure, Concurrent… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135299/masst-docs/ai/quantization-speculative-decoding-serving/the-precision-ladder-000021.png Quantization, speculative decoding, serving · The precision ladder · AI Engineering | MASST Docs Quantization, speculative decoding, serving — Precision ladder: flowchart covering fp32 / float32…, bf16 / fp16…, fp8…, int8…, SmoothQuant. Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135305/masst-docs/ai/quantization-speculative-decoding-serving/vanilla-draft-target-speculative-decoding-000053.png Quantization, speculative decoding, serving · Vanilla draft-target speculative decoding · AI Engineering | MASST Docs Quantization, speculative decoding, serving — Vanilla draft-target speculative decoding: flowchart covering Step start, Draft model generates K tokens autoregressively…, Target… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135318/masst-docs/ai/quantization-speculative-decoding-serving/decision-rule-00001f.png Quantization, speculative decoding, serving · Decision rule · AI Engineering | MASST Docs Quantization, speculative decoding, serving — Decision rule: flowchart covering Self-host?, Use hosted API…, GPU available?, Quality budget?, int8 W8A16 or int4 AWQ…. Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/inference/sampling https://res.cloudinary.com/ddg380vsg/image/upload/v1782135329/masst-docs/ai/sampling-temperature-structured-output/visual-the-sampling-pipeline-00006d.png Sampling, temperature, structured output · Visual: the sampling pipeline · AI Engineering | MASST Docs Sampling, temperature, structured output — The sampling pipeline: flowchart covering Raw logits over vocab…, Apply logit_bias…, Apply frequency / presence / repetition penalties,… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782287018/masst-docs/ai/sampling-temperature-structured-output/decision-rule-000057.png Sampling, temperature, structured output · Decision rule · AI Engineering | MASST Docs Sampling, temperature, structured output — Decision rule: flowchart covering What task?, temp=0.0 schema-enforced output…, temp=0.0 to 0.2 top_p=1.0 no frequency penalty, temp=0.9… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/retrieval/chunking https://res.cloudinary.com/ddg380vsg/image/upload/v1782135355/masst-docs/ai/chunking/the-problem-chunking-solves-00002a.png Chunking · The problem chunking solves · AI Engineering | MASST Docs Chunking — Problem chunking solves: flowchart covering Chunk size choice. Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135371/masst-docs/ai/chunking/visual-how-a-single-document-gets-chunked-00000b.png Chunking · Visual: how a single document gets chunked · AI Engineering | MASST Docs Chunking — How a single document gets chunked: flowchart covering Document: 200-page T&C PDF, Chunking strategy, Every 512 chars even mid-sentence chunks 1..N, 1 sentence per… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135377/masst-docs/ai/chunking/decision-rule-00001e.png Chunking · Decision rule · AI Engineering | MASST Docs Chunking — Decision rule: flowchart covering Building RAG?, Avg doc size?, Don't chunk — embed whole doc, Doc structure?, Late chunking + parent-document. Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/retrieval/embeddings https://res.cloudinary.com/ddg380vsg/image/upload/v1782135382/masst-docs/ai/embedding-models/visual-how-a-query-becomes-a-top-k-result-000059.png Embedding models · Visual: how a query becomes a top-K result · AI Engineering | MASST Docs Embedding models — How a query becomes a top-K result: flowchart covering User query: 'B2B refund policy', Tokenize…, Encoder: 12-32 transformer layers, mean/CLS pooling, Query… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135387/masst-docs/ai/embedding-models/decision-rule-000021.png Embedding models · Decision rule · AI Engineering | MASST Docs Embedding models — Decision rule: flowchart covering Picking an embedder?, Primary language?, Domain?, 10+ langs, Cohere embed-multilingual-v3 or BGE-M3. Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/retrieval/hybrid-search https://res.cloudinary.com/ddg380vsg/image/upload/v1782135392/masst-docs/ai/hybrid-search/visual-the-hybrid-pipeline-00002c.png Hybrid search · Visual: the hybrid pipeline · AI Engineering | MASST Docs Hybrid search — The hybrid pipeline: flowchart covering User query, Dense encoder…, BM25 / SPLADE tokenizer, Query vector, Query terms w/ IDF weights. Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135398/masst-docs/ai/hybrid-search/decision-rule-00006c.png Hybrid search · Decision rule · AI Engineering | MASST Docs Hybrid search — Decision rule: flowchart covering Building retrieval?, Query mix?, Dense only…, BM25 only…, typical RAG. Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/retrieval https://res.cloudinary.com/ddg380vsg/image/upload/v1782135403/masst-docs/ai/retrieval-depth/a-typical-production-retrieval-stack-000000.png Retrieval depth · A typical production retrieval stack · AI Engineering | MASST Docs Retrieval depth — A typical production retrieval stack: flowchart covering User query, Query expansion / rewrite, Parallel retrieval, Dense: embedding ANN, Sparse: BM25 / Elastic. Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/retrieval/rerankers-context https://res.cloudinary.com/ddg380vsg/image/upload/v1782135408/masst-docs/ai/rerankers-context-engineering/the-core-insight-00004b.png Rerankers & context engineering · The core insight · AI Engineering | MASST Docs Rerankers & context engineering — Core insight: flowchart covering Cross-encoder (reranker), Bi-encoder (retrieval), Query, Encode, Doc. Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135414/masst-docs/ai/rerankers-context-engineering/visual-the-full-retrieval-stack-00000d.png Rerankers & context engineering · Visual: the full retrieval stack · AI Engineering | MASST Docs Rerankers & context engineering — The full retrieval stack: flowchart covering User query, Stage 1: hybrid retrieval…, Top-50 candidates, Stage 2: cross-encoder rerank…, Top-5… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135429/masst-docs/ai/rerankers-context-engineering/decision-rule-00001d.png Rerankers & context engineering · Decision rule · AI Engineering | MASST Docs Rerankers & context engineering — Decision rule: flowchart covering RAG with retrieval shipped?, Corpus size?, Skip reranker…, Latency budget?, bge-reranker-base…. Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/safety https://res.cloudinary.com/ddg380vsg/image/upload/v1782287019/masst-docs/ai/safety-guardrails/visual-the-llm-threat-model-00005c.png Safety & guardrails · Visual — the LLM threat model · AI Engineering | MASST Docs Safety & guardrails — The LLM threat model: flowchart covering Supply chain — LLM03, LLM04, LLM08, Output surface — LLM02, LLM05, LLM06, LLM09, LLM, Input surface — LLM01, LLM07,… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135476/masst-docs/ai/safety-guardrails/decision-rule-00006a.png Safety & guardrails · Decision rule · AI Engineering | MASST Docs Safety & guardrails — Decision rule: flowchart covering Building an LLM feature, Model takes actions or just generates text?, Reads user content or third-party content?, web,… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/safety/output-validation https://res.cloudinary.com/ddg380vsg/image/upload/v1782135493/masst-docs/ai/output-validation-pii-redaction-jailbreak-resistan/visual-the-output-validation-pipeline-000031.png Output validation, PII redaction, jailbreak resistance · Visual — the output validation pipeline · AI Engineering | MASST Docs Output validation, PII redaction, jailbreak resistance — The output validation pipeline: flowchart covering LLM raw output, Schema valid?, Retry with error feedback, or fail… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135511/masst-docs/ai/output-validation-pii-redaction-jailbreak-resistan/decision-rule-00001f.png Output validation, PII redaction, jailbreak resistance · Decision rule · AI Engineering | MASST Docs Output validation, PII redaction, jailbreak resistance — Decision rule: flowchart covering LLM response, What does the response do?, L1 schema + L3 PII + L4 harm classifier,… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/ai/safety/prompt-injection https://res.cloudinary.com/ddg380vsg/image/upload/v1782135521/masst-docs/ai/prompt-injection-defenses/visual-direct-vs-indirect-injection-000032.png Prompt injection defenses · Visual — direct vs. indirect injection · AI Engineering | MASST Docs Prompt injection defenses — Direct vs. indirect injection: flowchart covering Indirect injection (third-party content is the attacker), Direct injection (user is the attacker),… Part of the AI Engineering series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135532/masst-docs/ai/prompt-injection-defenses/decision-rule-000008.png Prompt injection defenses · Decision rule · AI Engineering | MASST Docs Prompt injection defenses — Decision rule: flowchart covering New LLM feature, Takes actions or just generates text?, Reads third-party content?, Blast radius of worst action?, L1… Part of the AI Engineering series on MASST Docs. https://docs.masst.dev/sd/architecture/api-gateway https://res.cloudinary.com/ddg380vsg/image/upload/v1782287020/masst-docs/sd/api-gateway/without-vs-with-api-gateway-000045.png API Gateway · Without vs With API Gateway · System Design | MASST Docs API Gateway — Without vs With API Gateway: flowchart covering With Gateway, Without Gateway, Client, Service A, Service B. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135563/masst-docs/sd/api-gateway/request-flow-000037.png API Gateway · Request Flow · System Design | MASST Docs API Gateway — Request Flow: flowchart covering Client Request, API Gateway, 1. SSL Termination, 2. Authentication, 3. Rate Limiting. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135579/masst-docs/sd/api-gateway/request-routing-000016.png API Gateway · Request Routing · System Design | MASST Docs API Gateway — Request Routing: flowchart covering Gateway, User Service, Order Service, Product Service. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782287021/masst-docs/sd/api-gateway/request-aggregation-00006d.png API Gateway · Request Aggregation · System Design | MASST Docs API Gateway — Request Aggregation: flowchart covering Client: GET /api/dashboard, Gateway, GET /users/profile, GET /orders/recent, GET /notifications/unread. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782287022/masst-docs/sd/api-gateway/protocol-translation-000032.png API Gateway · Protocol Translation · System Design | MASST Docs API Gateway — Protocol Translation: flowchart covering Client, Gateway, Services. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/architecture/bff https://res.cloudinary.com/ddg380vsg/image/upload/v1782135617/masst-docs/sd/backend-for-frontend-bff/the-problem-00001c.png Backend for Frontend (BFF) · The Problem · System Design | MASST Docs Backend for Frontend (BFF) — Problem: flowchart covering Generic API, Web App, Single API, Mobile App, TV App. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135623/masst-docs/sd/backend-for-frontend-bff/the-bff-solution-00003b.png Backend for Frontend (BFF) · The BFF Solution · System Design | MASST Docs Backend for Frontend (BFF) — BFF Solution: flowchart covering Web App, Web BFF, Mobile App, Mobile BFF, TV App. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135628/masst-docs/sd/backend-for-frontend-bff/bff-vs-api-gateway-000004.png Backend for Frontend (BFF) · BFF vs API Gateway · System Design | MASST Docs Backend for Frontend (BFF) — BFF vs API Gateway: flowchart covering Clients, API Gateway, Web BFF, Mobile BFF, Services. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/architecture/service-discovery https://res.cloudinary.com/ddg380vsg/image/upload/v1782135633/masst-docs/sd/service-discovery/the-problem-00001b.png Service Discovery · The Problem · System Design | MASST Docs Service Discovery — Problem: flowchart covering Service A, 192.168.1.10:8080…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135637/masst-docs/sd/service-discovery/client-side-discovery-00005f.png Service Discovery · Client-Side Discovery · System Design | MASST Docs Service Discovery — Client-Side Discovery: flowchart covering Registry Service B: - 10.0.0.1 - 10.0.0.2, Service B 10.0.0.1. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135642/masst-docs/sd/service-discovery/server-side-discovery-00001a.png Service Discovery · Server-Side Discovery · System Design | MASST Docs Service Discovery — Server-Side Discovery: flowchart covering Load Balancer, Service B. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135647/masst-docs/sd/service-discovery/self-registration-000012.png Service Discovery · Self-Registration · System Design | MASST Docs Service Discovery — Self-Registration: flowchart covering Service starts, Register with registry, Service stops, Deregister from registry, Health check. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135653/masst-docs/sd/service-discovery/third-party-registration-000014.png Service Discovery · Third-Party Registration · System Design | MASST Docs Service Discovery — Third-Party Registration: flowchart covering Watch containers. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/architecture/service-mesh https://res.cloudinary.com/ddg380vsg/image/upload/v1782135659/masst-docs/sd/service-mesh/without-vs-with-service-mesh-00002d.png Service Mesh · Without vs With Service Mesh · System Design | MASST Docs Service Mesh — Without vs With Service Mesh: flowchart covering With Mesh, Without Mesh, Service A, Service B, Service C. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135664/masst-docs/sd/service-mesh/sidecar-pattern-000029.png Service Mesh · Sidecar Pattern · System Design | MASST Docs Service Mesh — Sidecar Pattern: flowchart covering Pod 2, Pod, Service, Sidecar Proxy. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135669/masst-docs/sd/service-mesh/data-plane-vs-control-plane-00000b.png Service Mesh · Data Plane vs Control Plane · System Design | MASST Docs Service Mesh — Data Plane vs Control Plane: flowchart covering Data Plane, Control Plane, Proxy. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135674/masst-docs/sd/service-mesh/canary-deployment-000074.png Service Mesh · Canary Deployment · System Design | MASST Docs Service Mesh — Canary Deployment: flowchart covering Gateway, Service v1, Service v2…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135680/masst-docs/sd/service-mesh/a-b-testing-000024.png Service Mesh · A/B Testing · System Design | MASST Docs Service Mesh — A/B Testing: flowchart covering Gateway, Service v1, Service v2. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135686/masst-docs/sd/service-mesh/security-mutual-tls-000052.png Service Mesh · Security: Mutual TLS · System Design | MASST Docs Service Mesh — Security: Mutual TLS: sequence diagram covering Proxy, mTLS. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/bloom-filters https://res.cloudinary.com/ddg380vsg/image/upload/v1782135691/masst-docs/sd/bloom-filters/use-case-database-optimization-00001c.png Bloom Filters · Use Case: Database Optimization · System Design | MASST Docs Bloom Filters — Use Case: Database Optimization: flowchart covering With Bloom Filter, Without Bloom Filter, Request, Check disk, Not found…. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/cache-aside https://res.cloudinary.com/ddg380vsg/image/upload/v1782135696/masst-docs/sd/cache-aside/read-path-000003.png Cache-Aside · Read Path · System Design | MASST Docs Cache-Aside — Read Path: sequence diagram covering key, data. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135701/masst-docs/sd/cache-aside/write-path-000064.png Cache-Aside · Write Path · System Design | MASST Docs Cache-Aside — Write Path: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135706/masst-docs/sd/cache-aside/cache-stampede-problem-00002e.png Cache-Aside · Cache Stampede Problem · System Design | MASST Docs Cache-Aside — Cache Stampede Problem: flowchart covering Cache expires, Request 1, Request 2, Request 3, Request N. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/cache-strategies https://res.cloudinary.com/ddg380vsg/image/upload/v1782135711/masst-docs/sd/cache-strategies/cache-layers-000041.png Cache Strategies · Cache Layers · System Design | MASST Docs Cache Strategies — Cache Layers: flowchart covering User Request, Browser Cachen…, CDNn…, Application Cachen…, Databasen…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135716/masst-docs/sd/cache-strategies/cache-aside-lazy-loading-00002d.png Cache Strategies · Cache-Aside (Lazy Loading) · System Design | MASST Docs Cache Strategies — Cache-Aside (Lazy Loading): flowchart covering Check Cache, Hit?, Read from DB, Store in Cache, Return Data. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135720/masst-docs/sd/cache-strategies/read-through-000071.png Cache Strategies · Read-Through · System Design | MASST Docs Cache Strategies — Read-Through: flowchart covering App, Cache. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782135733/masst-docs/sd/cache-strategies/write-through-000056.png Cache Strategies · Write-Through · System Design | MASST Docs Cache Strategies — Write-Through: flowchart covering App, Cache, Return Success. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782287023/masst-docs/sd/cache-strategies/write-behind-write-back-000057.png Cache Strategies · Write-Behind (Write-Back) · System Design | MASST Docs Cache Strategies — Write-Behind (Write-Back): flowchart covering App, Cache, Return Success. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/cdn https://res.cloudinary.com/ddg380vsg/image/upload/v1782135763/masst-docs/sd/cdn/how-cdn-works-00007b.png CDN · How CDN Works · System Design | MASST Docs CDN — How CDN Works: flowchart covering With CDN, Without CDN, User…, Origin…, Edge…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782325295/masst-docs/sd/cdn/cdn-architecture-000066.png CDN · CDN Architecture · System Design | MASST Docs CDN — CDN Architecture: flowchart covering Origin Server, Edge…, Users. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/consistent-hashing https://res.cloudinary.com/ddg380vsg/image/upload/v1782137745/masst-docs/sd/consistent-hashing/the-hash-ring-000017.png Consistent Hashing · The Hash Ring · System Design | MASST Docs Consistent Hashing — Hash Ring: flowchart covering Hash Ring, S1…, S2…, S3…, S4…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782137757/masst-docs/sd/consistent-hashing/virtual-nodes-00003c.png Consistent Hashing · Virtual Nodes · System Design | MASST Docs Consistent Hashing — Virtual Nodes: flowchart covering Physical → Virtual Nodes, Server A, Server B. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782137767/masst-docs/sd/consistent-hashing/adding-a-node-000052.png Consistent Hashing · Adding a Node · System Design | MASST Docs Consistent Hashing — Adding a Node: flowchart covering Adding Server B, Server B…, Server A. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782137773/masst-docs/sd/consistent-hashing/removing-a-node-00001e.png Consistent Hashing · Removing a Node · System Design | MASST Docs Consistent Hashing — Removing a Node: flowchart covering Server B…, Server A, Only keys on B remapped — other keys unaffected. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/distributed-locking https://res.cloudinary.com/ddg380vsg/image/upload/v1782137778/masst-docs/sd/distributed-locking/lock-flow-000039.png Distributed Locking · Lock Flow · System Design | MASST Docs Distributed Locking — Lock Flow: sequence diagram. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/dns https://res.cloudinary.com/ddg380vsg/image/upload/v1782287024/masst-docs/sd/dns/how-dns-works-000008.png DNS · How DNS Works · System Design | MASST Docs DNS — How DNS Works: sequence diagram covering ISP / 8.8.8.8, .com. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138410/masst-docs/sd/dns/load-distribution-00002b.png DNS · Load Distribution · System Design | MASST Docs DNS — Load Distribution: flowchart covering example.com, 192.168.1.1…, 192.168.1.2…, 192.168.1.3…. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/heartbeat https://res.cloudinary.com/ddg380vsg/image/upload/v1782138416/masst-docs/sd/heartbeat/how-it-works-000018.png Heartbeat · How It Works · System Design | MASST Docs Heartbeat — How It Works: sequence diagram covering I'm alive. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138421/masst-docs/sd/heartbeat/push-based-00001a.png Heartbeat · Push-Based · System Design | MASST Docs Heartbeat — Push-Based: flowchart covering Node 1, Monitor, Node 2, Node 3. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138426/masst-docs/sd/heartbeat/pull-based-polling-000032.png Heartbeat · Pull-Based (Polling) · System Design | MASST Docs Heartbeat — Pull-Based (Polling): flowchart covering Monitor, Node 1, Node 2, Node 3. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138431/masst-docs/sd/heartbeat/peer-to-peer-00006d.png Heartbeat · Peer-to-Peer · System Design | MASST Docs Heartbeat — Peer-to-Peer: flowchart covering Node 1, Node 2, Node 3. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138436/masst-docs/sd/heartbeat/failure-detection-000068.png Heartbeat · Failure Detection · System Design | MASST Docs Heartbeat — Failure Detection: state machine. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/indexing https://res.cloudinary.com/ddg380vsg/image/upload/v1782138447/masst-docs/sd/indexing/how-indexes-work-00001b.png Indexing · How Indexes Work · System Design | MASST Docs Indexing — How Indexes Work: flowchart covering With Index, Without Index, Query: WHERE user_id = 123, Scan all 1M rows O…, B-tree lookup O…. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/leader-election https://res.cloudinary.com/ddg380vsg/image/upload/v1782138458/masst-docs/sd/leader-election/why-leader-election-00004b.png Leader Election · Why Leader Election? · System Design | MASST Docs Leader Election — Why Leader Election?: flowchart covering With Leader, Without Leader, Node A…, Node B…, Node C…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138463/masst-docs/sd/leader-election/1-bully-algorithm-000067.png Leader Election · 1. Bully Algorithm · System Design | MASST Docs Leader Election — Bully Algorithm: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138468/masst-docs/sd/leader-election/2-ring-algorithm-000043.png Leader Election · 2. Ring Algorithm · System Design | MASST Docs Leader Election — Ring Algorithm: flowchart covering Node 1, Node 2, Node 3, Node 4. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138473/masst-docs/sd/leader-election/raft-consensus-leader-election-part-000035.png Leader Election · Raft Consensus (Leader Election Part) · System Design | MASST Docs Leader Election — Raft Consensus (Leader Election Part): flowchart covering Term 2 (B fails), Term 1. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138478/masst-docs/sd/leader-election/raft-consensus-leader-election-part-00007f.png Leader Election · Raft Consensus (Leader Election Part) · System Design | MASST Docs Leader Election — Raft Consensus (Leader Election Part): sequence diagram covering Candidate, Follower, majority votes. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138483/masst-docs/sd/leader-election/split-brain-prevention-000002.png Leader Election · Split Brain Prevention · System Design | MASST Docs Leader Election — Split Brain Prevention: flowchart covering Partition 2, Partition 1. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/load-balancer https://res.cloudinary.com/ddg380vsg/image/upload/v1782138493/masst-docs/sd/load-balancer/load-balancer-architecture-000032.png Load Balancer · Load Balancer Architecture · System Design | MASST Docs Load Balancer — Load Balancer Architecture: flowchart covering Clients, Load Balancer, Server 1, Server 2, Server 3. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138501/masst-docs/sd/load-balancer/layer-7-application-00004d.png Load Balancer · Layer 7 (Application) · System Design | MASST Docs Load Balancer — Layer 7 (Application): flowchart covering Layer 7 LB, API Servers, Static Servers, Admin Servers. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138510/masst-docs/sd/load-balancer/health-checks-00000b.png Load Balancer · Health Checks · System Design | MASST Docs Load Balancer — Health Checks: flowchart covering Load Balancer, Server 1, Server 2, Server 3…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138515/masst-docs/sd/load-balancer/high-availability-000009.png Load Balancer · High Availability · System Design | MASST Docs Load Balancer — High Availability: flowchart covering LB…, Virtual IP. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/message-queues https://res.cloudinary.com/ddg380vsg/image/upload/v1782138520/masst-docs/sd/message-queues/how-it-works-000050.png Message Queues · How It Works · System Design | MASST Docs Message Queues — How It Works: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138529/masst-docs/sd/message-queues/point-to-point-00005c.png Message Queues · Point-to-Point · System Design | MASST Docs Message Queues — Point-to-Point: flowchart covering Producer, Queue, Consumer, Consumer…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138534/masst-docs/sd/message-queues/work-queue-00003f.png Message Queues · Work Queue · System Design | MASST Docs Message Queues — Work Queue: flowchart covering Producer, Queue, Worker 1, Worker 2, Worker 3. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/pub-sub https://res.cloudinary.com/ddg380vsg/image/upload/v1782138539/masst-docs/sd/pub-sub/how-it-works-00006c.png Pub/Sub · How It Works · System Design | MASST Docs Pub/Sub — How It Works: flowchart covering Publisher A, Topics, Publisher B, Subscriber 1, Subscriber 2. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138544/masst-docs/sd/pub-sub/push-000049.png Pub/Sub · Push · System Design | MASST Docs Pub/Sub — Push: flowchart covering Topic, Subscriber…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138549/masst-docs/sd/pub-sub/pull-00001f.png Pub/Sub · Pull · System Design | MASST Docs Pub/Sub — Pull: flowchart covering Subscriber, Topic. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138555/masst-docs/sd/pub-sub/fan-out-pattern-000037.png Pub/Sub · Fan-out Pattern · System Design | MASST Docs Pub/Sub — Fan-out Pattern: flowchart covering Order Placed, Inventory Service…, Email Service…, Analytics Service…, Shipping Service…. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/rate-limiting https://res.cloudinary.com/ddg380vsg/image/upload/v1782138560/masst-docs/sd/rate-limiting/token-bucket-00005d.png Rate Limiting · Token Bucket · System Design | MASST Docs Rate Limiting — Token Bucket: flowchart covering Refill…, Bucket…, Request, Allow ✓, Deny ✗. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138565/masst-docs/sd/rate-limiting/leaky-bucket-000071.png Rate Limiting · Leaky Bucket · System Design | MASST Docs Rate Limiting — Leaky Bucket: flowchart covering Requests, Queue…, Process, Drop ✗. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138570/masst-docs/sd/rate-limiting/where-to-rate-limit-00001f.png Rate Limiting · Where to Rate Limit · System Design | MASST Docs Rate Limiting — Where to Rate Limit: flowchart covering Client, CDN…, API Gateway…, Service…. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/reverse-proxy https://res.cloudinary.com/ddg380vsg/image/upload/v1782138579/masst-docs/sd/reverse-proxy/forward-vs-reverse-proxy-00000f.png Reverse Proxy · Forward vs Reverse Proxy · System Design | MASST Docs Reverse Proxy — Forward vs Reverse Proxy: flowchart covering Reverse Proxy (server-side), Forward Proxy (client-side), Client, Proxyn…, Internet. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138584/masst-docs/sd/reverse-proxy/2-ssl-termination-000072.png Reverse Proxy · 2. SSL Termination · System Design | MASST Docs Reverse Proxy — SSL Termination: flowchart covering Client, Reverse Proxyn…, Backend. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138589/masst-docs/sd/reverse-proxy/3-caching-00006b.png Reverse Proxy · 3. Caching · System Design | MASST Docs Reverse Proxy — Caching: flowchart covering Request 2, Request 1, Client, Proxy, Backend → Response…. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/sharding https://res.cloudinary.com/ddg380vsg/image/upload/v1782138595/masst-docs/sd/sharding/1-range-based-sharding-000053.png Sharding · 1. Range-Based Sharding · System Design | MASST Docs Sharding — Range-Based Sharding: flowchart covering Shard 1nuser_id 1 - 1,000,000, Shard 2nuser_id 1,000,001 - 2,000,000, Shard 3nuser_id 2,000,001 - 3,000,000. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138599/masst-docs/sd/sharding/3-directory-based-sharding-000033.png Sharding · 3. Directory-Based Sharding · System Design | MASST Docs Sharding — Directory-Based Sharding: flowchart covering Lookup Table, Shard 1, Shard 2. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138604/masst-docs/sd/sharding/sharding-architecture-000015.png Sharding · Sharding Architecture · System Design | MASST Docs Sharding — Sharding Architecture: flowchart covering Router / Proxy, Shard 1, Shard 2, Shard 3. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138609/masst-docs/sd/sharding/consistent-hashing-000036.png Sharding · Consistent Hashing · System Design | MASST Docs Sharding — Consistent Hashing: flowchart covering Hash Ring, 0° — Shard A, 90° — Shard B, 180° — Shard C, 270°. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/task-queues https://res.cloudinary.com/ddg380vsg/image/upload/v1782138613/masst-docs/sd/task-queues/how-it-works-000060.png Task Queues · How It Works · System Design | MASST Docs Task Queues — How It Works: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138618/masst-docs/sd/task-queues/task-states-000027.png Task Queues · Task States · System Design | MASST Docs Task Queues — Task States: flowchart covering DEAD…. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/write-behind https://res.cloudinary.com/ddg380vsg/image/upload/v1782138622/masst-docs/sd/write-behind/how-it-works-000004.png Write-Behind · How It Works · System Design | MASST Docs Write-Behind — How It Works: sequence diagram covering key, data. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/building-blocks/write-through https://res.cloudinary.com/ddg380vsg/image/upload/v1782138627/masst-docs/sd/write-through/how-it-works-00003a.png Write-Through · How It Works · System Design | MASST Docs Write-Through — How It Works: sequence diagram covering key, data. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138632/masst-docs/sd/write-through/read-flow-000058.png Write-Through · Read Flow · System Design | MASST Docs Write-Through — Read Flow: sequence diagram. Part of the System Design series on MASST Docs. https://docs.masst.dev/hld/amazon https://res.cloudinary.com/ddg380vsg/image/upload/v1782138641/masst-docs/hld/amazon/high-level-architecture-000008.png Amazon · High-Level Architecture · HLD Case Study | MASST Docs Amazon — High-Level Architecture: flowchart covering Data Layer, Core Services, API Gateway, CDN & Edge, Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138649/masst-docs/hld/amazon/1-product-catalog-service-00007a.png Amazon · 1. Product Catalog Service · HLD Case Study | MASST Docs Amazon — Product Catalog Service: flowchart covering Storage Layer, Content Management, Catalog Domain, Catalog Service Product Management, Category Manager Taxonomy. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138655/masst-docs/hld/amazon/2-search-discovery-engine-000053.png Amazon · 2. Search & Discovery Engine · HLD Case Study | MASST Docs Amazon — Search & Discovery Engine: flowchart covering A9 Algorithm, Result Enhancement, Search Infrastructure, Query Processing, Query Parser NLP Processing. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138665/masst-docs/hld/amazon/3-shopping-cart-checkout-000032.png Amazon · 3. Shopping Cart & Checkout · HLD Case Study | MASST Docs Amazon — Shopping Cart & Checkout: flowchart covering Order Creation, Payment Processing, Checkout Flow, Cart Management, Cart Service Session Management. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138670/masst-docs/hld/amazon/4-order-management-system-00007e.png Amazon · 4. Order Management System · HLD Case Study | MASST Docs Amazon — Order Management System: flowchart covering Communication, Order Operations, Fulfillment Options, Order Lifecycle, Pending Awaiting Payment. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138681/masst-docs/hld/amazon/5-inventory-management-000039.png Amazon · 5. Inventory Management · HLD Case Study | MASST Docs Amazon — Inventory Management: flowchart covering Multi-location, Inventory Tracking, Inventory Operations, Inventory Sources, Amazon Warehouses FBA Inventory. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138691/masst-docs/hld/amazon/6-recommendation-engine-000074.png Amazon · 6. Recommendation Engine · HLD Case Study | MASST Docs Amazon — Recommendation Engine: flowchart covering Optimization, Recommendation Types, ML Models, Data Collection, Browse History Page Views. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138703/masst-docs/hld/amazon/1-dynamodb-primary-nosql-000032.png Amazon · 1. DynamoDB (Primary NoSQL) · HLD Case Study | MASST Docs Amazon — DynamoDB (Primary NoSQL): flowchart covering DynamoDB Features, Access Patterns, Order Tables, Customer Tables, Product Tables. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138709/masst-docs/hld/amazon/2-aurora-mysql-relational-00000e.png Amazon · 2. Aurora MySQL (Relational) · HLD Case Study | MASST Docs Amazon — Aurora MySQL (Relational): flowchart covering Optimization, Database Schemas, Secondary Region, Primary Region, Aurora Cluster. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138718/masst-docs/hld/amazon/3-elasticache-redis-00006f.png Amazon · 3. ElastiCache Redis · HLD Case Study | MASST Docs Amazon — ElastiCache Redis: flowchart covering Data Patterns, Cache Cluster, Cart Cluster, Session Cluster, Redis Cluster. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138723/masst-docs/hld/amazon/4-opensearch-search-infrastructure-000031.png Amazon · 4. OpenSearch (Search Infrastructure) · HLD Case Study | MASST Docs Amazon — OpenSearch (Search Infrastructure): flowchart covering Search Features, Indices, Data Nodes, Master Nodes, OpenSearch Cluster. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138738/masst-docs/hld/amazon/1-fulfillment-center-operations-000000.png Amazon · 1. Fulfillment Center Operations · HLD Case Study | MASST Docs Amazon — Fulfillment Center Operations: flowchart covering Pack & Ship, Pick Operations, Storage Systems, Inbound Operations, Receiving Dock Truck Unload. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138747/masst-docs/hld/amazon/2-delivery-network-00007d.png Amazon · 2. Delivery Network · HLD Case Study | MASST Docs Amazon — Delivery Network: flowchart covering Delivery Intelligence, Delivery Speed, Carrier Partners, Last Mile Options, Delivery Service Partners Amazon Branded. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138753/masst-docs/hld/amazon/1-auto-scaling-architecture-000012.png Amazon · 1. Auto-Scaling Architecture · HLD Case Study | MASST Docs Amazon — Auto-Scaling Architecture: flowchart covering Traffic Management, Database Scaling, Scaling Triggers, Application Scaling, ECS Fargate Container Scaling. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138762/masst-docs/hld/amazon/2-caching-strategy-000078.png Amazon · 2. Caching Strategy · HLD Case Study | MASST Docs Amazon — Caching Strategy: flowchart covering Invalidation, Cache Patterns, Cache Layers, Browser Cache Static Assets 1 year TTL, CloudFront Edge Cache 24 hour TTL. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138771/masst-docs/hld/amazon/3-prime-day-architecture-000059.png Amazon · 3. Prime Day Architecture · HLD Case Study | MASST Docs Amazon — Prime Day Architecture: flowchart covering Monitoring, Feature Toggles, Traffic Management, Capacity Planning, Traffic Forecast ML Prediction. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138776/masst-docs/hld/amazon/1-multi-layer-security-000042.png Amazon · 1. Multi-Layer Security · HLD Case Study | MASST Docs Amazon — Multi-Layer Security: flowchart covering Fraud Prevention, Data Security, Identity & Access, Network Security, AWS WAF Web Application Firewall. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138781/masst-docs/hld/amazon/2-pci-dss-compliance-000019.png Amazon · 2. PCI DSS Compliance · HLD Case Study | MASST Docs Amazon — PCI DSS Compliance: flowchart covering Audit & Compliance, Security Controls, Cardholder Data Environment, Card Input Tokenization Point, Payment Processing Isolated… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138786/masst-docs/hld/amazon/1-monitoring-stack-000026.png Amazon · 1. Monitoring Stack · HLD Case Study | MASST Docs Amazon — Monitoring Stack: flowchart covering Alerting, Visualization, Log Aggregation, Metrics Collection, CloudWatch AWS Metrics. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138791/masst-docs/hld/amazon/2-key-performance-indicators-00006b.png Amazon · 2. Key Performance Indicators · HLD Case Study | MASST Docs Amazon — Key Performance Indicators: flowchart covering Seller KPIs, Operational KPIs, Business KPIs, Customer Experience KPIs, Page Load Time Target: < 2s. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138796/masst-docs/hld/amazon/1-real-time-data-pipeline-00007f.png Amazon · 1. Real-time Data Pipeline · HLD Case Study | MASST Docs Amazon — Real-time Data Pipeline: flowchart covering ML Pipeline, Data Storage, Stream Processing, Message Queue, Data Sources. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138801/masst-docs/hld/amazon/1-event-streaming-platform-000034.png Amazon · 1. Event Streaming Platform · HLD Case Study | MASST Docs Amazon — Event Streaming Platform: flowchart covering Event Store, Event Consumers, Event Bus, Event Producers, Order Events Created, Updated, Shipped. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138806/masst-docs/hld/amazon/2-saga-pattern-for-orders-00005f.png Amazon · 2. Saga Pattern for Orders · HLD Case Study | MASST Docs Amazon — Saga Pattern for Orders: sequence diagram covering PENDING, CONFIRMED, CANCELLED. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138811/masst-docs/hld/amazon/1-multi-region-deployment-000060.png Amazon · 1. Multi-Region Deployment · HLD Case Study | MASST Docs Amazon — Multi-Region Deployment: flowchart covering Global Services, Asia Pacific, Europe, North America, US-East-1 Primary. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138816/masst-docs/hld/amazon/2-disaster-recovery-000071.png Amazon · 2. Disaster Recovery · HLD Case Study | MASST Docs Amazon — Disaster Recovery: flowchart covering Data Protection, Failover Process, Recovery Metrics, DR Strategy, Active-Active Multi-region Traffic. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138821/masst-docs/hld/amazon/1-continuous-integration-continuous-deployment-000060.png Amazon · 1. Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Amazon — Continuous Integration/Continuous Deployment: architecture diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138826/masst-docs/hld/amazon/1-continuous-integration-continuous-deployment-000067.png Amazon · 1. Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Amazon — Continuous Integration/Continuous Deployment: flowchart covering Rollback Strategy, Deployment Pipeline, Development, Code Commit, Build & Test. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138831/masst-docs/hld/amazon/3-chaos-engineering-000001.png Amazon · 3. Chaos Engineering · HLD Case Study | MASST Docs Amazon — Chaos Engineering: flowchart covering Response, Monitoring, Target Systems, Chaos Tools, AWS Fault Injection Simulator. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138836/masst-docs/hld/amazon/1-cost-management-00005c.png Amazon · 1. Cost Management · HLD Case Study | MASST Docs Amazon — Cost Management: distribution chart covering EC2, ECS, Lambda, S3, EBS, DynamoDB, Aurora, CloudFront, Data Transfer, OpenSearch. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138841/masst-docs/hld/amazon/1-cost-management-000016.png Amazon · 1. Cost Management · HLD Case Study | MASST Docs Amazon — Cost Management: flowchart covering Network Optimization, Database Optimization, Storage Optimization, Compute Optimization, Spot Instances 70% Savings. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138846/masst-docs/hld/amazon/1-emerging-technologies-00004d.png Amazon · 1. Emerging Technologies · HLD Case Study | MASST Docs Amazon — Emerging Technologies: flowchart covering Infrastructure Evolution, Shopping Experience, Next-Gen Delivery, AI/ML Enhancements, AI-Powered Search Natural Language. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/chess-com https://res.cloudinary.com/ddg380vsg/image/upload/v1782138852/masst-docs/hld/chess-com/high-level-architecture-000071.png Chess.com · High-Level Architecture · HLD Case Study | MASST Docs Chess.com — High-Level Architecture: flowchart covering Data Layer, Core Services, Real-time Layer, CDN & Edge, Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138863/masst-docs/hld/chess-com/1-real-time-game-engine-000038.png Chess.com · 1. Real-time Game Engine · HLD Case Study | MASST Docs Chess.com — Real-time Game Engine: flowchart covering Time Management, Move Processing, Game State Machine, Game Connection, Player Connection WebSocket Handshake. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138884/masst-docs/hld/chess-com/2-websocket-gateway-00007e.png Chess.com · 2. WebSocket Gateway · HLD Case Study | MASST Docs Chess.com — WebSocket Gateway: flowchart covering Scaling, Pub/Sub System, Message Protocol, Connection Management, Load Balancer Sticky Sessions. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138894/masst-docs/hld/chess-com/3-matchmaking-system-00003f.png Chess.com · 3. Matchmaking System · HLD Case Study | MASST Docs Chess.com — Matchmaking System: flowchart covering Anti-Abuse, Match Creation, Matching Algorithm, Queue Management, Join Queue Player Request. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138905/masst-docs/hld/chess-com/4-rating-system-glicko-2-000077.png Chess.com · 4. Rating System (Glicko-2) · HLD Case Study | MASST Docs Chess.com — Rating System (Glicko-2): flowchart covering Rating Types, Rating Update, Game Outcome Processing, Rating Components, Rating Skill Level. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138916/masst-docs/hld/chess-com/5-game-analysis-engine-000058.png Chess.com · 5. Game Analysis Engine · HLD Case Study | MASST Docs Chess.com — Game Analysis Engine: flowchart covering Storage & Cache, Analysis Output, Stockfish Engine, Analysis Request, Game End Trigger Analysis. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138933/masst-docs/hld/chess-com/6-tournament-system-000068.png Chess.com · 6. Tournament System · HLD Case Study | MASST Docs Chess.com — Tournament System: flowchart covering Real-time Updates, Scoring System, Tournament Management, Tournament Types, Arena Tournament Time-based. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138942/masst-docs/hld/chess-com/1-postgresql-primary-database-00003d.png Chess.com · 1. PostgreSQL (Primary Database) · HLD Case Study | MASST Docs Chess.com — PostgreSQL (Primary Database): flowchart covering Indexing, Partitioning Strategy, Schemas, Primary Cluster, Database Clusters. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138949/masst-docs/hld/chess-com/2-redis-real-time-state-00007d.png Chess.com · 2. Redis (Real-time State) · HLD Case Study | MASST Docs Chess.com — Redis (Real-time State): flowchart covering TTL Policies, Data Structures, Pub/Sub Cluster, Session Cluster, Game State Cluster. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138957/masst-docs/hld/chess-com/3-mongodb-content-storage-00004c.png Chess.com · 3. MongoDB (Content Storage) · HLD Case Study | MASST Docs Chess.com — MongoDB (Content Storage): flowchart covering Indexing, Document Structure, Collections, Replica Set, MongoDB Cluster. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138964/masst-docs/hld/chess-com/4-clickhouse-analytics-00002f.png Chess.com · 4. ClickHouse (Analytics) · HLD Case Study | MASST Docs Chess.com — ClickHouse (Analytics): flowchart covering Analytics Queries, Tables, ClickHouse Cluster, Node 1 Game Analytics, Node 2 User Analytics. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138974/masst-docs/hld/chess-com/1-cheat-detection-architecture-000028.png Chess.com · 1. Cheat Detection Architecture · HLD Case Study | MASST Docs Chess.com — Cheat Detection Architecture: flowchart covering Actions, Engine Detection, Analysis Pipeline, Detection Methods, Engine Correlation Move Matching. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138984/masst-docs/hld/chess-com/2-fair-play-monitoring-000003.png Chess.com · 2. Fair Play Monitoring · HLD Case Study | MASST Docs Chess.com — Fair Play Monitoring: flowchart covering Appeal Process, Post-game Analysis, Real-time Monitoring, Live Analysis During Game, Move Time Analysis Consistency Check. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138990/masst-docs/hld/chess-com/1-puzzle-generation-rating-000005.png Chess.com · 1. Puzzle Generation & Rating · HLD Case Study | MASST Docs Chess.com — Puzzle Generation & Rating: flowchart covering Puzzle Selection, Puzzle Rating, Puzzle Validation, Puzzle Source, Game Mining Extract Positions. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782138995/masst-docs/hld/chess-com/1-horizontal-scaling-000057.png Chess.com · 1. Horizontal Scaling · HLD Case Study | MASST Docs Chess.com — Horizontal Scaling: flowchart covering Capacity, Auto-scaling Rules, Load Balancing, Application Tier, Web Servers Stateless Auto-scaled. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139000/masst-docs/hld/chess-com/2-latency-optimization-00003b.png Chess.com · 2. Latency Optimization · HLD Case Study | MASST Docs Chess.com — Latency Optimization: flowchart covering Latency Targets, Server Optimization, Protocol Optimization, Edge Optimization, Edge POPs Global Distribution. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139005/masst-docs/hld/chess-com/1-monitoring-stack-00000e.png Chess.com · 1. Monitoring Stack · HLD Case Study | MASST Docs Chess.com — Monitoring Stack: flowchart covering Alerting, Tracing, Logging, Metrics, Prometheus Time Series. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139012/masst-docs/hld/chess-com/2-key-metrics-000053.png Chess.com · 2. Key Metrics · HLD Case Study | MASST Docs Chess.com — Key Metrics: flowchart covering Business Metrics, User Metrics, Performance Metrics, Game Metrics, Active Games Real-time Count. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139019/masst-docs/hld/chess-com/1-continuous-deployment-pipeline-000013.png Chess.com · 1. Continuous Deployment Pipeline · HLD Case Study | MASST Docs Chess.com — Continuous Deployment Pipeline: architecture diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139026/masst-docs/hld/chess-com/1-continuous-deployment-pipeline-00003b.png Chess.com · 1. Continuous Deployment Pipeline · HLD Case Study | MASST Docs Chess.com — Continuous Deployment Pipeline: flowchart covering Rollback Strategy, Deployment Pipeline, Development, Code Commit, Build & Test Automated Suite. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139034/masst-docs/hld/chess-com/3-chaos-engineering-00003f.png Chess.com · 3. Chaos Engineering · HLD Case Study | MASST Docs Chess.com — Chaos Engineering: flowchart covering Response, Monitoring, Target Systems, Chaos Scenarios, WebSocket Server Kill Connection Drop. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139039/masst-docs/hld/chess-com/1-data-pipeline-00004f.png Chess.com · 1. Data Pipeline · HLD Case Study | MASST Docs Chess.com — Data Pipeline: flowchart covering Applications, ML Models, Processing, Data Sources, Game Data Moves, Results. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139045/masst-docs/hld/chess-com/1-infrastructure-cost-distribution-000007.png Chess.com · 1. Infrastructure Cost Distribution · HLD Case Study | MASST Docs Chess.com — Infrastructure Cost Distribution: distribution chart covering Game Servers, API, PostgreSQL, Redis, Stockfish Workers, Games, Puzzles. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139050/masst-docs/hld/chess-com/2-cost-optimization-strategies-000044.png Chess.com · 2. Cost Optimization Strategies · HLD Case Study | MASST Docs Chess.com — Cost Optimization Strategies: flowchart covering Network Optimization, Analysis Optimization, Database Optimization, Compute Optimization, Spot Instances Analysis… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139056/masst-docs/hld/chess-com/1-emerging-technologies-000052.png Chess.com · 1. Emerging Technologies · HLD Case Study | MASST Docs Chess.com — Emerging Technologies: flowchart covering Technical Evolution, Social & Community, Immersive Experience, AI & Chess, AI Coach Personalized Training. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139063/masst-docs/hld/chess-com/1-mobile-app-architecture-000046.png Chess.com · 1. Mobile App Architecture · HLD Case Study | MASST Docs Chess.com — Mobile App Architecture: flowchart covering Push Notifications, Offline Support, Core Features, Mobile Platforms, iOS App Swift/SwiftUI. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/coinbase https://res.cloudinary.com/ddg380vsg/image/upload/v1782139070/masst-docs/hld/coinbase/high-level-architecture-000007.png Coinbase · High-Level Architecture · HLD Case Study | MASST Docs Coinbase — High-Level Architecture: flowchart covering Data Layer, Core Services, API Gateway, Edge Layer, Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139077/masst-docs/hld/coinbase/1-trading-engine-matching-engine-00001e.png Coinbase · 1. Trading Engine (Matching Engine) · HLD Case Study | MASST Docs Coinbase — Trading Engine (Matching Engine): flowchart covering Market Data, Settlement, Matching Engine, Order Ingestion, New Order Buy/Sell. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139082/masst-docs/hld/coinbase/2-wallet-infrastructure-00007f.png Coinbase · 2. Wallet Infrastructure · HLD Case Study | MASST Docs Coinbase — Wallet Infrastructure: sequence diagram covering 6 blocks BTC, Multi-sig. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139088/masst-docs/hld/coinbase/3-custody-solution-00004c.png Coinbase · 3. Custody Solution · HLD Case Study | MASST Docs Coinbase — Custody Solution: flowchart covering Insurance, Access Control, Security Layers, Custody Tiers, Hot Wallet Immediate Access. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139093/masst-docs/hld/coinbase/4-blockchain-integration-000028.png Coinbase · 4. Blockchain Integration · HLD Case Study | MASST Docs Coinbase — Blockchain Integration: flowchart covering Compliance Integration, Transaction Processing, Node Infrastructure, Supported Chains, Bitcoin UTXO Model. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139099/masst-docs/hld/coinbase/postgresql-primary-database-000057.png Coinbase · PostgreSQL (Primary Database) · HLD Case Study | MASST Docs Coinbase — PostgreSQL (Primary Database): flowchart covering Data Types, Sharding, Read Path, Write Path, PostgreSQL Architecture. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139105/masst-docs/hld/coinbase/timescaledb-market-data-000074.png Coinbase · TimescaleDB (Market Data) · HLD Case Study | MASST Docs Coinbase — TimescaleDB (Market Data): flowchart covering Consumers, Continuous Aggregates, Hypertables, TimescaleDB Architecture, Trades Hypertable Time-partitioned. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139116/masst-docs/hld/coinbase/redis-caching-real-time-000062.png Coinbase · Redis (Caching & Real-time) · HLD Case Study | MASST Docs Coinbase — Redis (Caching & Real-time): flowchart covering Use Cases, Pub/Sub Cluster, Market Data Cluster, Session Cluster, Redis Clusters. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139122/masst-docs/hld/coinbase/stream-processing-architecture-000046.png Coinbase · Stream Processing Architecture · HLD Case Study | MASST Docs Coinbase — Stream Processing Architecture: flowchart covering Consumers, Stream Processing, Apache Kafka, Event Sources, Trade Events. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139127/masst-docs/hld/coinbase/1-order-book-management-000039.png Coinbase · 1. Order Book Management · HLD Case Study | MASST Docs Coinbase — Order Book Management: flowchart covering Optimization, Data Structures, Order Book Structure, Bids Buy Orders, Asks Sell Orders. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139134/masst-docs/hld/coinbase/2-rate-limiting-000063.png Coinbase · 2. Rate Limiting · HLD Case Study | MASST Docs Coinbase — Rate Limiting: flowchart covering Response, Implementation, Rate Limit Tiers, Public API 10 req/sec, Private API 15 req/sec. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139139/masst-docs/hld/coinbase/3-high-availability-000025.png Coinbase · 3. High Availability · HLD Case Study | MASST Docs Coinbase — High Availability: flowchart covering Failover, Secondary Region (US-West), Primary Region (US-East), Load Balancer, API Servers. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139153/masst-docs/hld/coinbase/security-architecture-00006a.png Coinbase · Security Architecture · HLD Case Study | MASST Docs Coinbase — Security Architecture: flowchart covering Compliance & Monitoring, Infrastructure, Key Security, Authentication, Multi-Factor Auth TOTP, Hardware Key. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139162/masst-docs/hld/coinbase/monitoring-and-observability-00001f.png Coinbase · Monitoring and Observability · HLD Case Study | MASST Docs Coinbase — Monitoring and Observability: flowchart covering Response, Analysis, Collection, Prometheus System Metrics, Jaeger Distributed Tracing. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139170/masst-docs/hld/coinbase/continuous-integration-continuous-deployment-00007e.png Coinbase · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Coinbase — Continuous Integration/Continuous Deployment: architecture diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139177/masst-docs/hld/coinbase/continuous-integration-continuous-deployment-000059.png Coinbase · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Coinbase — Continuous Integration/Continuous Deployment: flowchart covering Validation, Deploy, Build, Development, Code Commit GitHub. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139183/masst-docs/hld/coinbase/chaos-engineering-00004f.png Coinbase · Chaos Engineering · HLD Case Study | MASST Docs Coinbase — Chaos Engineering: flowchart covering Learning, Measurement, Targets, Chaos Experiments, Node Failure Blockchain Sync. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139188/masst-docs/hld/coinbase/data-pipeline-00003d.png Coinbase · Data Pipeline · HLD Case Study | MASST Docs Coinbase — Data Pipeline: flowchart covering ML Applications, Storage, Processing, Event Sources, Trade Events. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139194/masst-docs/hld/coinbase/cost-optimization-000050.png Coinbase · Cost Optimization · HLD Case Study | MASST Docs Coinbase — Cost Optimization: distribution chart. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139199/masst-docs/hld/coinbase/cost-optimization-000018.png Coinbase · Cost Optimization · HLD Case Study | MASST Docs Coinbase — Cost Optimization: flowchart covering Blockchain Optimization, Storage Optimization, Compute Optimization, Reserved Instances Trading Infrastructure, Spot Instances… Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/dropbox-sign https://res.cloudinary.com/ddg380vsg/image/upload/v1782139204/masst-docs/hld/hellosign-dropbox-sign/high-level-architecture-00003a.png HelloSign (Dropbox Sign) · High-Level Architecture · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — High-Level Architecture: flowchart covering Data Layer, Processing Layer, Core Services, API Gateway, CDN & Edge. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139210/masst-docs/hld/hellosign-dropbox-sign/1-document-management-system-00004d.png HelloSign (Dropbox Sign) · 1. Document Management System · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Document Management System: flowchart covering Storage Layer, Document Security, Document Processing, Document Lifecycle, Document Upload Multi-format… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139220/masst-docs/hld/hellosign-dropbox-sign/2-e-signature-engine-000070.png HelloSign (Dropbox Sign) · 2. E-Signature Engine · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — E-Signature Engine: flowchart covering Compliance & Legal, Cryptographic Layer, Signature Processing, Signature Types, Typed Signature Font-based. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139225/masst-docs/hld/hellosign-dropbox-sign/3-workflow-engine-000013.png HelloSign (Dropbox Sign) · 3. Workflow Engine · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Workflow Engine: flowchart covering State Management, Participant Management, Workflow Management, Workflow Types, Sequential Signing One by One. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139231/masst-docs/hld/hellosign-dropbox-sign/4-template-system-000064.png HelloSign (Dropbox Sign) · 4. Template System · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Template System: flowchart covering Advanced Features, Template Management, Field Types, Template Creation, Template Designer Drag & Drop. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139237/masst-docs/hld/hellosign-dropbox-sign/5-authentication-identity-verification-00005b.png HelloSign (Dropbox Sign) · 5. Authentication & Identity Verification · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Authentication & Identity Verification: flowchart covering Session Management, Multi-factor Authentication, Identity Verification, Authentication… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139242/masst-docs/hld/hellosign-dropbox-sign/1-postgresql-primary-database-000041.png HelloSign (Dropbox Sign) · 1. PostgreSQL (Primary Database) · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — PostgreSQL (Primary Database): flowchart covering Backup & Recovery, Performance Optimization, Schema Design, Primary Cluster, Database Clusters. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139247/masst-docs/hld/hellosign-dropbox-sign/2-mongodb-document-storage-000070.png HelloSign (Dropbox Sign) · 2. MongoDB (Document Storage) · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — MongoDB (Document Storage): flowchart covering Indexing, Sharding Strategy, Collections, Replica Set, MongoDB Cluster. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139257/masst-docs/hld/hellosign-dropbox-sign/3-redis-cache-layer-000013.png HelloSign (Dropbox Sign) · 3. Redis Cache Layer · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Redis Cache Layer: flowchart covering Use Cases, Cache Patterns, Redis Cluster, Redis Architecture, Master 1 Session Data. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139263/masst-docs/hld/hellosign-dropbox-sign/4-amazon-s3-document-storage-000050.png HelloSign (Dropbox Sign) · 4. Amazon S3 (Document Storage) · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Amazon S3 (Document Storage): flowchart covering Cross-region Replication, Security & Compliance, Content Types, Storage Classes, S3 Storage Architecture. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139269/masst-docs/hld/hellosign-dropbox-sign/1-document-processing-workflow-00000c.png HelloSign (Dropbox Sign) · 1. Document Processing Workflow · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Document Processing Workflow: sequence diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139275/masst-docs/hld/hellosign-dropbox-sign/2-pdf-manipulation-engine-000018.png HelloSign (Dropbox Sign) · 2. PDF Manipulation Engine · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — PDF Manipulation Engine: flowchart covering Signature Integration, Field Management, PDF Enhancement, PDF Operations, Format Conversion DOCX, PNG, JPG →… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139280/masst-docs/hld/hellosign-dropbox-sign/1-security-architecture-000011.png HelloSign (Dropbox Sign) · 1. Security Architecture · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Security Architecture: flowchart covering Infrastructure Security, Document Security, Data Security, Application Security, Network Security. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139287/masst-docs/hld/hellosign-dropbox-sign/2-compliance-framework-000019.png HelloSign (Dropbox Sign) · 2. Compliance Framework · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Compliance Framework: flowchart covering Audit & Certification, Industry Standards, Data Privacy, Legal Compliance, ESIGN Act US Federal Law. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139297/masst-docs/hld/hellosign-dropbox-sign/3-audit-trail-system-000079.png HelloSign (Dropbox Sign) · 3. Audit Trail System · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Audit Trail System: flowchart covering Audit Analysis, Audit Storage, Event Processing, Event Capture, Document Events Create, View, Sign. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139306/masst-docs/hld/hellosign-dropbox-sign/1-api-architecture-000076.png HelloSign (Dropbox Sign) · 1. API Architecture · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — API Architecture: flowchart covering Authentication, Developer Tools, API Management, API Gateway Layer, REST API HTTP/JSON. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139312/masst-docs/hld/hellosign-dropbox-sign/2-integration-ecosystem-000018.png HelloSign (Dropbox Sign) · 2. Integration Ecosystem · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Integration Ecosystem: flowchart covering Enterprise Systems, Developer Platforms, Business Applications, Productivity Tools, CRM Integrations. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139317/masst-docs/hld/hellosign-dropbox-sign/3-webhook-system-00002a.png HelloSign (Dropbox Sign) · 3. Webhook System · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Webhook System: sequence diagram covering 1 min, 5 min, 30 min. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139323/masst-docs/hld/hellosign-dropbox-sign/1-multi-channel-notification-architecture-000022.png HelloSign (Dropbox Sign) · 1. Multi-channel Notification Architecture · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Multi-channel Notification Architecture: flowchart covering Notification Preferences, Email Service, Notification Channels, Notification Triggers,… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139329/masst-docs/hld/hellosign-dropbox-sign/2-smart-reminder-system-000039.png HelloSign (Dropbox Sign) · 2. Smart Reminder System · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Smart Reminder System: flowchart covering Reminder Actions, Reminder Intelligence, Reminder Schedule, Reminder Logic, Auto Reminder Scheduled. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139338/masst-docs/hld/hellosign-dropbox-sign/1-auto-scaling-architecture-000028.png HelloSign (Dropbox Sign) · 1. Auto-scaling Architecture · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Auto-scaling Architecture: flowchart covering Cost Optimization, Scaling Policies, Scaling Metrics, Application Tier Scaling, Web Servers 2-50 instances. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139343/masst-docs/hld/hellosign-dropbox-sign/2-caching-strategy-000077.png HelloSign (Dropbox Sign) · 2. Caching Strategy · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Caching Strategy: flowchart covering Cache Performance, Cache Invalidation, Cache Layers, Browser Cache Static Assets 1 year TTL, CDN Cache Documents &… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139354/masst-docs/hld/hellosign-dropbox-sign/3-database-performance-optimization-000017.png HelloSign (Dropbox Sign) · 3. Database Performance Optimization · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Database Performance Optimization: flowchart covering Partitioning Strategy, Query Optimization, Write Optimization, Read Optimization, Read Replicas 5… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139361/masst-docs/hld/hellosign-dropbox-sign/1-comprehensive-monitoring-stack-000001.png HelloSign (Dropbox Sign) · 1. Comprehensive Monitoring Stack · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Comprehensive Monitoring Stack: flowchart covering Visualization & Alerting, Application Performance, Distributed Tracing, Logging Infrastructure,… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139366/masst-docs/hld/hellosign-dropbox-sign/2-key-performance-indicators-000044.png HelloSign (Dropbox Sign) · 2. Key Performance Indicators · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Key Performance Indicators: flowchart covering Infrastructure KPIs, System Performance KPIs, Business KPIs, User Experience KPIs, Page Load Time Target:… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139372/masst-docs/hld/hellosign-dropbox-sign/3-alerting-strategy-000004.png HelloSign (Dropbox Sign) · 3. Alerting Strategy · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Alerting Strategy: flowchart covering Response Teams, Notification Channels, Alert Types, Alert Severity, P0 - Critical Service Down < 5 min response. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139382/masst-docs/hld/hellosign-dropbox-sign/1-ci-cd-pipeline-00000b.png HelloSign (Dropbox Sign) · 1. CI/CD Pipeline · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — CI/CD Pipeline: flowchart covering Rollback Strategy, Continuous Deployment, Artifact Management, Continuous Integration, Source Control. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139387/masst-docs/hld/hellosign-dropbox-sign/2-infrastructure-as-code-000012.png HelloSign (Dropbox Sign) · 2. Infrastructure as Code · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Infrastructure as Code: flowchart covering Secret Management, GitOps Workflow, Environment Management, IaC Tools, Terraform Infrastructure Provisioning. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139392/masst-docs/hld/hellosign-dropbox-sign/3-container-orchestration-000020.png HelloSign (Dropbox Sign) · 3. Container Orchestration · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Container Orchestration: flowchart covering Observability, Service Mesh, Workload Types, Kubernetes Architecture, Master Nodes Control Plane HA Setup. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139397/masst-docs/hld/hellosign-dropbox-sign/1-backup-strategy-000008.png HelloSign (Dropbox Sign) · 1. Backup Strategy · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Backup Strategy: flowchart covering Testing & Validation, Recovery Procedures, Backup Storage, Backup Types, Full Backup Weekly Complete System. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139402/masst-docs/hld/hellosign-dropbox-sign/2-high-availability-design-00000e.png HelloSign (Dropbox Sign) · 2. High Availability Design · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — High Availability Design: flowchart covering Recovery Metrics, Data Replication, Redundancy, Availability Targets, Web Tier 99.99% Uptime 52 min/year… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139413/masst-docs/hld/hellosign-dropbox-sign/3-disaster-recovery-scenarios-000028.png HelloSign (Dropbox Sign) · 3. Disaster Recovery Scenarios · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Disaster Recovery Scenarios: flowchart covering Validation & Communication, Recovery Actions, Detection & Response, Disaster Types, Availability Zone… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139422/masst-docs/hld/hellosign-dropbox-sign/1-mobile-app-architecture-000029.png HelloSign (Dropbox Sign) · 1. Mobile App Architecture · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Mobile App Architecture: flowchart covering Backend Services, Mobile SDK, Mobile Features, Mobile Platforms, iOS App Swift/SwiftUI. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139428/masst-docs/hld/hellosign-dropbox-sign/2-offline-support-00006d.png HelloSign (Dropbox Sign) · 2. Offline Support · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Offline Support: flowchart covering Online Detection, Queue Management, Sync Strategy, Local Storage, SQLite Database Structured Data. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139434/masst-docs/hld/hellosign-dropbox-sign/1-analytics-pipeline-00001f.png HelloSign (Dropbox Sign) · 1. Analytics Pipeline · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Analytics Pipeline: flowchart covering Analytics & Visualization, Data Warehouse, Data Processing, Data Ingestion, Data Sources. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139439/masst-docs/hld/hellosign-dropbox-sign/2-key-metrics-reports-000019.png HelloSign (Dropbox Sign) · 2. Key Metrics & Reports · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Key Metrics & Reports: flowchart covering Operational Metrics, Business Metrics, Performance Metrics, Usage Metrics, Daily Active Users Engagement. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139444/masst-docs/hld/hellosign-dropbox-sign/3-machine-learning-applications-000013.png HelloSign (Dropbox Sign) · 3. Machine Learning Applications · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Machine Learning Applications: flowchart covering Operational Intelligence, User Experience, Document Intelligence, Predictive Analytics, Completion… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139450/masst-docs/hld/hellosign-dropbox-sign/1-cost-management-strategy-000068.png HelloSign (Dropbox Sign) · 1. Cost Management Strategy · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Cost Management Strategy: distribution chart covering EC2, ECS, Lambda, S3, EBS, Glacier, RDS, DynamoDB. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139456/masst-docs/hld/hellosign-dropbox-sign/1-cost-management-strategy-000016.png HelloSign (Dropbox Sign) · 1. Cost Management Strategy · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Cost Management Strategy: flowchart covering Monitoring & Control, Network Optimization, Database Optimization, Storage Optimization, Compute… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139461/masst-docs/hld/hellosign-dropbox-sign/1-emerging-technologies-000036.png HelloSign (Dropbox Sign) · 1. Emerging Technologies · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Emerging Technologies: flowchart covering Platform Evolution, Enhanced Collaboration, Advanced Security, Blockchain & Web3, AI & Automation. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139471/masst-docs/hld/hellosign-dropbox-sign/2-scalability-roadmap-000070.png HelloSign (Dropbox Sign) · 2. Scalability Roadmap · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Scalability Roadmap: architecture diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139476/masst-docs/hld/hellosign-dropbox-sign/3-compliance-evolution-00002d.png HelloSign (Dropbox Sign) · 3. Compliance Evolution · HLD Case Study | MASST Docs HelloSign (Dropbox Sign) — Compliance Evolution: flowchart covering Future Standards, Industry-Specific, Expanding Compliance, Current Compliance, ESIGN Act US Federal. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/google-docs https://res.cloudinary.com/ddg380vsg/image/upload/v1782139487/masst-docs/hld/google-docs/high-level-architecture-000078.png Google Docs · High-Level Architecture · HLD Case Study | MASST Docs Google Docs — High-Level Architecture: flowchart covering Data Layer, Core Services, Real-time Layer, CDN & Edge, Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139494/masst-docs/hld/google-docs/1-operational-transformation-ot-engine-00000a.png Google Docs · 1. Operational Transformation (OT) Engine · HLD Case Study | MASST Docs Google Docs — Operational Transformation (OT) Engine: flowchart covering Conflict Scenarios, Transformation Process, Operation Types, OT Fundamentals, Operation… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139499/masst-docs/hld/google-docs/1-operational-transformation-ot-engine-00001a.png Google Docs · 1. Operational Transformation (OT) Engine · HLD Case Study | MASST Docs Google Docs — Operational Transformation (OT) Engine: sequence diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139509/masst-docs/hld/google-docs/2-real-time-collaboration-engine-000076.png Google Docs · 2. Real-time Collaboration Engine · HLD Case Study | MASST Docs Google Docs — Real-time Collaboration Engine: flowchart covering Recovery, Message Types, Synchronization, Connection Management, Client Connection WebSocket/SSE. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139517/masst-docs/hld/google-docs/3-document-model-000056.png Google Docs · 3. Document Model · HLD Case Study | MASST Docs Google Docs — Document Model: flowchart covering Formatting, Text Runs, Content Elements, Document Structure, Document Root Container. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139522/masst-docs/hld/google-docs/4-revision-history-system-00005e.png Google Docs · 4. Revision History System · HLD Case Study | MASST Docs Google Docs — Revision History System: flowchart covering Storage Optimization, Comparison, Revision Operations, Revision Storage, Operation Log Every Edit. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139528/masst-docs/hld/google-docs/5-sharing-permissions-system-00005e.png Google Docs · 5. Sharing & Permissions System · HLD Case Study | MASST Docs Google Docs — Sharing & Permissions System: flowchart covering Advanced Permissions, Link Settings, Sharing Methods, Access Levels, Owner Full Control. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139533/masst-docs/hld/google-docs/6-comments-suggestions-system-00007b.png Google Docs · 6. Comments & Suggestions System · HLD Case Study | MASST Docs Google Docs — Comments & Suggestions System: flowchart covering Thread Management, Notifications, Suggestion Mode, Comment Types, Inline Comment Text Selection. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139538/masst-docs/hld/google-docs/1-bigtable-document-storage-000010.png Google Docs · 1. Bigtable (Document Storage) · HLD Case Study | MASST Docs Google Docs — Bigtable (Document Storage): flowchart covering Column Families, Row Key Design, Table Structure, Cluster Setup, Bigtable Architecture. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139544/masst-docs/hld/google-docs/2-cloud-spanner-metadata-000067.png Google Docs · 2. Cloud Spanner (Metadata) · HLD Case Study | MASST Docs Google Docs — Cloud Spanner (Metadata): flowchart covering Transactions, Schema Design, Tables, Global Distribution, Spanner Database. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139549/masst-docs/hld/google-docs/3-colossus-file-storage-000022.png Google Docs · 3. Colossus (File Storage) · HLD Case Study | MASST Docs Google Docs — Colossus (File Storage): flowchart covering Replication, Storage Types, Colossus Architecture, GFS Master Metadata, Chunk Server 1 Data Blocks. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139554/masst-docs/hld/google-docs/4-memcache-caching-layer-000075.png Google Docs · 4. Memcache (Caching Layer) · HLD Case Study | MASST Docs Google Docs — Memcache (Caching Layer): flowchart covering Cache Statistics, Invalidation, Cache Keys, Cache Tiers, L1 Cache Hot Documents. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139559/masst-docs/hld/google-docs/1-offline-architecture-000077.png Google Docs · 1. Offline Architecture · HLD Case Study | MASST Docs Google Docs — Offline Architecture: flowchart covering Recovery, Conflict Resolution, Sync Strategy, Local Storage, IndexedDB Document Storage. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139564/masst-docs/hld/google-docs/1-global-infrastructure-00004e.png Google Docs · 1. Global Infrastructure · HLD Case Study | MASST Docs Google Docs — Global Infrastructure: flowchart covering Data Locality, Edge Services, Regional Deployment, Global Load Balancing, Global Server LB Anycast DNS. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139575/masst-docs/hld/google-docs/2-auto-scaling-000077.png Google Docs · 2. Auto-Scaling · HLD Case Study | MASST Docs Google Docs — Auto-Scaling: flowchart covering Capacity Planning, Scaling Actions, Scaling Triggers, Scaling Dimensions, Web Tier Stateless Scaling. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139585/masst-docs/hld/google-docs/3-performance-optimization-000057.png Google Docs · 3. Performance Optimization · HLD Case Study | MASST Docs Google Docs — Performance Optimization: flowchart covering Performance Targets, Server Optimization, Network Optimization, Client Optimization, Virtual Rendering Visible Content… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139591/masst-docs/hld/google-docs/1-multi-layer-security-00000f.png Google Docs · 1. Multi-Layer Security · HLD Case Study | MASST Docs Google Docs — Multi-Layer Security: flowchart covering Data Security, Authorization, Authentication, Transport Security, TLS 1.3 In Transit. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139597/masst-docs/hld/google-docs/2-enterprise-security-000060.png Google Docs · 2. Enterprise Security · HLD Case Study | MASST Docs Google Docs — Enterprise Security: flowchart covering Threat Protection, Compliance, Data Protection, Workspace Security, Admin Console Central Management. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139602/masst-docs/hld/google-docs/1-monitoring-stack-00000b.png Google Docs · 1. Monitoring Stack · HLD Case Study | MASST Docs Google Docs — Monitoring Stack: flowchart covering Alerting, Tracing, Logging, Metrics, Monarch Time Series DB. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139613/masst-docs/hld/google-docs/2-key-metrics-000021.png Google Docs · 2. Key Metrics · HLD Case Study | MASST Docs Google Docs — Key Metrics: flowchart covering Business Metrics, Reliability Metrics, Performance Metrics, Collaboration Metrics, Active Documents Concurrent Editing. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139623/masst-docs/hld/google-docs/1-mobile-app-design-00001a.png Google Docs · 1. Mobile App Design · HLD Case Study | MASST Docs Google Docs — Mobile App Design: flowchart covering Performance, Sync Strategy, Core Features, Mobile Platforms, iOS App Swift/UIKit. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139628/masst-docs/hld/google-docs/1-continuous-deployment-pipeline-00004d.png Google Docs · 1. Continuous Deployment Pipeline · HLD Case Study | MASST Docs Google Docs — Continuous Deployment Pipeline: architecture diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139634/masst-docs/hld/google-docs/1-continuous-deployment-pipeline-000078.png Google Docs · 1. Continuous Deployment Pipeline · HLD Case Study | MASST Docs Google Docs — Continuous Deployment Pipeline: flowchart covering Rollback Strategy, Deployment Pipeline, Development, Code Commit, Build & Test Hermetic Builds. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139640/masst-docs/hld/google-docs/3-chaos-engineering-000007.png Google Docs · 3. Chaos Engineering · HLD Case Study | MASST Docs Google Docs — Chaos Engineering: flowchart covering Response, Monitoring, Target Systems, Chaos Scenarios, Region Failure Geographic Outage. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139646/masst-docs/hld/google-docs/1-data-pipeline-00005e.png Google Docs · 1. Data Pipeline · HLD Case Study | MASST Docs Google Docs — Data Pipeline: flowchart covering Outputs, ML Applications, Processing, Data Sources, User Actions Edits, Comments. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139651/masst-docs/hld/google-docs/1-infrastructure-cost-distribution-000066.png Google Docs · 1. Infrastructure Cost Distribution · HLD Case Study | MASST Docs Google Docs — Infrastructure Cost Distribution: distribution chart covering Serving, OT, Bigtable, Colossus, Spanner. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139656/masst-docs/hld/google-docs/2-cost-optimization-strategies-000000.png Google Docs · 2. Cost Optimization Strategies · HLD Case Study | MASST Docs Google Docs — Cost Optimization Strategies: flowchart covering Operational Efficiency, Network Optimization, Storage Optimization, Compute Optimization, Borg Efficiency Resource… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139662/masst-docs/hld/google-docs/1-emerging-technologies-000051.png Google Docs · 1. Emerging Technologies · HLD Case Study | MASST Docs Google Docs — Emerging Technologies: flowchart covering Technical Evolution, Platform Evolution, Collaboration Evolution, AI-Powered Features, Gemini in Docs AI Assistant. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139668/masst-docs/hld/google-docs/1-add-on-architecture-000036.png Google Docs · 1. Add-on Architecture · HLD Case Study | MASST Docs Google Docs — Add-on Architecture: flowchart covering Security, API Integration, Apps Script, Add-on Types, Editor Add-ons Document Tools. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/google-drive https://res.cloudinary.com/ddg380vsg/image/upload/v1782139674/masst-docs/hld/google-drive/high-level-architecture-000070.png Google Drive · High-Level Architecture · HLD Case Study | MASST Docs Google Drive — High-Level Architecture: flowchart covering Storage Layer, Core Services, API Layer, Edge Layer, Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139685/masst-docs/hld/google-drive/1-file-upload-pipeline-000012.png Google Drive · 1. File Upload Pipeline · HLD Case Study | MASST Docs Google Drive — File Upload Pipeline: flowchart covering Post-Processing, Storage, Processing Pipeline, Upload Initiation, Create Upload Session Resumable URI. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139691/masst-docs/hld/google-drive/2-sync-engine-000060.png Google Drive · 2. Sync Engine · HLD Case Study | MASST Docs Google Drive — Sync Engine: sequence diagram covering pageToken. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139698/masst-docs/hld/google-drive/3-sharing-and-permissions-000071.png Google Drive · 3. Sharing and Permissions · HLD Case Study | MASST Docs Google Drive — Sharing and Permissions: flowchart covering Advanced, Access Control, Share Targets, Permission Types, Owner Full Control. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139704/masst-docs/hld/google-drive/4-real-time-collaboration-000073.png Google Drive · 4. Real-time Collaboration · HLD Case Study | MASST Docs Google Drive — Real-time Collaboration: flowchart covering Distribution, Storage, Server Side, Client Side, Document Editor. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139710/masst-docs/hld/google-drive/colossus-distributed-file-system-000070.png Google Drive · Colossus (Distributed File System) · HLD Case Study | MASST Docs Google Drive — Colossus (Distributed File System): flowchart covering Access Layer, Data Layout, Storage, Metadata, Colossus Architecture. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139715/masst-docs/hld/google-drive/bigtable-metadata-store-000061.png Google Drive · Bigtable (Metadata Store) · HLD Case Study | MASST Docs Google Drive — Bigtable (Metadata Store): flowchart covering Applications, Activity Table, File Metadata Table, Bigtable Schema, Row Key: user_idfile_id. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139720/masst-docs/hld/google-drive/cloud-spanner-permissions-00003b.png Google Drive · Cloud Spanner (Permissions) · HLD Case Study | MASST Docs Google Drive — Cloud Spanner (Permissions): flowchart covering Services, Tables, Global Distribution, Spanner Architecture, US Region Primary. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139726/masst-docs/hld/google-drive/stream-processing-architecture-000031.png Google Drive · Stream Processing Architecture · HLD Case Study | MASST Docs Google Drive — Stream Processing Architecture: flowchart covering Analytics, Real-time Systems, Stream Processing, Event Sources, File Events Create, Update, Delete. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139735/masst-docs/hld/google-drive/1-content-addressing-000054.png Google Drive · 1. Content Addressing · HLD Case Study | MASST Docs Google Drive — Content Addressing: flowchart covering Reference Counting, Storage Decision, Upload Flow, File Upload, SHA-256 Hash Content Address. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139740/masst-docs/hld/google-drive/2-hierarchical-caching-000065.png Google Drive · 2. Hierarchical Caching · HLD Case Study | MASST Docs Google Drive — Hierarchical Caching: flowchart covering Storage, Backend Cache, Edge Cache, Client Cache, Local Cache Desktop Sync. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139745/masst-docs/hld/google-drive/3-quotas-and-rate-limiting-000008.png Google Drive · 3. Quotas and Rate Limiting · HLD Case Study | MASST Docs Google Drive — Quotas and Rate Limiting: flowchart covering Response, Enforcement, Quota Types, Storage Quota 15GB Free, API Quota Requests/Second. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139750/masst-docs/hld/google-drive/security-architecture-000073.png Google Drive · Security Architecture · HLD Case Study | MASST Docs Google Drive — Security Architecture: flowchart covering Threat Protection, Compliance, Access Control, Data Protection, TLS 1.3 In Transit. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139756/masst-docs/hld/google-drive/monitoring-and-observability-00006c.png Google Drive · Monitoring and Observability · HLD Case Study | MASST Docs Google Drive — Monitoring and Observability: flowchart covering SLOs, Response, Analysis, Metrics Collection, Monarch Time Series DB. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139762/masst-docs/hld/google-drive/continuous-integration-continuous-deployment-000031.png Google Drive · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Google Drive — Continuous Integration/Continuous Deployment: architecture diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139767/masst-docs/hld/google-drive/continuous-integration-continuous-deployment-00005b.png Google Drive · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Google Drive — Continuous Integration/Continuous Deployment: flowchart covering Safety, Release, Development, Code Commit Piper/CitC, Blaze Build. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139772/masst-docs/hld/google-drive/chaos-engineering-00006a.png Google Drive · Chaos Engineering · HLD Case Study | MASST Docs Google Drive — Chaos Engineering: flowchart covering Learning, Measurement, Targets, DiRT Exercises, Region Failure Entire Datacenter. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139778/masst-docs/hld/google-drive/data-pipeline-000070.png Google Drive · Data Pipeline · HLD Case Study | MASST Docs Google Drive — Data Pipeline: flowchart covering ML Applications, Processing, Event Sources, File Operations CRUD Events, Sharing Events Permission Changes. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139788/masst-docs/hld/google-drive/cost-optimization-00007e.png Google Drive · Cost Optimization · HLD Case Study | MASST Docs Google Drive — Cost Optimization: distribution chart. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139798/masst-docs/hld/google-drive/cost-optimization-000073.png Google Drive · Cost Optimization · HLD Case Study | MASST Docs Google Drive — Cost Optimization: flowchart covering Network Optimization, Compute Optimization, Storage Optimization, Deduplication Content Addressing, Compression Snappy, Zstd. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/instagram https://res.cloudinary.com/ddg380vsg/image/upload/v1782139807/masst-docs/hld/instagram/high-level-architecture-000027.png Instagram · High-Level Architecture · HLD Case Study | MASST Docs Instagram — High-Level Architecture: flowchart covering Data Layer, Core Services, API Gateway, Edge Layer, Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139813/masst-docs/hld/instagram/1-feed-generation-pipeline-00002e.png Instagram · 1. Feed Generation Pipeline · HLD Case Study | MASST Docs Instagram — Feed Generation Pipeline: flowchart covering Final Assembly, Ranking Pipeline, Candidate Generation, Content Sources, Following Posts. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139818/masst-docs/hld/instagram/2-stories-pipeline-000076.png Instagram · 2. Stories Pipeline · HLD Case Study | MASST Docs Instagram — Stories Pipeline: sequence diagram covering Image/Video, 24h. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139825/masst-docs/hld/instagram/3-reels-processing-000078.png Instagram · 3. Reels Processing · HLD Case Study | MASST Docs Instagram — Reels Processing: flowchart covering Recommendation, Distribution, Content Analysis, Upload Pipeline, Video Upload Up to 90 seconds. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139831/masst-docs/hld/instagram/4-direct-messages-dm-00001a.png Instagram · 4. Direct Messages (DM) · HLD Case Study | MASST Docs Instagram — Direct Messages (DM): flowchart covering Features, Storage, Message Flow, Send Message, End-to-End Encryption Signal Protocol. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139836/masst-docs/hld/instagram/tao-the-associations-and-objects-000013.png Instagram · TAO (The Associations and Objects) · HLD Case Study | MASST Docs Instagram — TAO (The Associations and Objects): flowchart covering Applications, Cache Layers, Association Types, Object Types, TAO Architecture. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139847/masst-docs/hld/instagram/cassandra-time-series-data-000008.png Instagram · Cassandra (Time-Series Data) · HLD Case Study | MASST Docs Instagram — Cassandra (Time-Series Data): flowchart covering Use Cases, Ring Structure, Keyspaces, Cassandra Cluster, Stories Keyspace TTL: 24h. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139856/masst-docs/hld/instagram/postgresql-transactional-data-000044.png Instagram · PostgreSQL (Transactional Data) · HLD Case Study | MASST Docs Instagram — PostgreSQL (Transactional Data): flowchart covering Data Types, Sharding Strategy, Primary-Replica, PostgreSQL Architecture, Direct Messages. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139862/masst-docs/hld/instagram/stream-processing-architecture-000002.png Instagram · Stream Processing Architecture · HLD Case Study | MASST Docs Instagram — Stream Processing Architecture: flowchart covering ML Pipeline, Storage, Stream Processing, Event Sources, Impression Events. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139868/masst-docs/hld/instagram/1-sharding-strategy-000058.png Instagram · 1. Sharding Strategy · HLD Case Study | MASST Docs Instagram — Sharding Strategy: flowchart covering Routing Layer, Shard Distribution, Sharding Dimensions, User Sharding By User ID, Geographic Sharding By Region. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139873/masst-docs/hld/instagram/2-caching-architecture-00003e.png Instagram · 2. Caching Architecture · HLD Case Study | MASST Docs Instagram — Caching Architecture: flowchart covering Database Cache, Application Cache, CDN Layer, Client Cache, Local Storage Offline Support. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139878/masst-docs/hld/instagram/3-rate-limiting-00003f.png Instagram · 3. Rate Limiting · HLD Case Study | MASST Docs Instagram — Rate Limiting: flowchart covering Response, Enforcement, Rate Limit Types, API Rate Limits Requests/Hour, Action Limits Follows, Likes/Day. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139884/masst-docs/hld/instagram/security-architecture-00004e.png Instagram · Security Architecture · HLD Case Study | MASST Docs Instagram — Security Architecture: flowchart covering Anti-Abuse, Infrastructure, Content Security, Authentication, OAuth 2.0 Third-party Apps. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139889/masst-docs/hld/instagram/monitoring-and-observability-00006a.png Instagram · Monitoring and Observability · HLD Case Study | MASST Docs Instagram — Monitoring and Observability: flowchart covering Visualization, Alerting, Analysis, Collection, ODS Metrics Time Series. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139894/masst-docs/hld/instagram/continuous-integration-continuous-deployment-000060.png Instagram · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Instagram — Continuous Integration/Continuous Deployment: architecture diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139899/masst-docs/hld/instagram/continuous-integration-continuous-deployment-00000a.png Instagram · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Instagram — Continuous Integration/Continuous Deployment: flowchart covering Monitoring, Release, Development, Code Commit Mercurial, Buck Build. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139908/masst-docs/hld/instagram/chaos-engineering-00007c.png Instagram · Chaos Engineering · HLD Case Study | MASST Docs Instagram — Chaos Engineering: flowchart covering Learning, Observation, Targets, Chaos Tools, Storm Testing Load Simulation. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139921/masst-docs/hld/instagram/data-pipeline-00007e.png Instagram · Data Pipeline · HLD Case Study | MASST Docs Instagram — Data Pipeline: flowchart covering ML Applications, Storage, Processing, Data Sources, App Logs User Actions. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139926/masst-docs/hld/instagram/cost-optimization-00000f.png Instagram · Cost Optimization · HLD Case Study | MASST Docs Instagram — Cost Optimization: distribution chart. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139931/masst-docs/hld/instagram/cost-optimization-00000d.png Instagram · Cost Optimization · HLD Case Study | MASST Docs Instagram — Cost Optimization: flowchart covering Network Optimization, Compute Optimization, Storage Optimization, Image Compression WebP, AVIF, Storage Tiering Hot/Cold. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/leetcode https://res.cloudinary.com/ddg380vsg/image/upload/v1782139937/masst-docs/hld/leetcode/high-level-architecture-000028.png LeetCode · High-Level Architecture · HLD Case Study | MASST Docs LeetCode — High-Level Architecture: flowchart covering Data Layer, Execution Environment, Microservices Layer, API Gateway, CDN Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139941/masst-docs/hld/leetcode/1-user-management-system-000040.png LeetCode · 1. User Management System · HLD Case Study | MASST Docs LeetCode — User Management System: flowchart covering Storage Layer, Authentication Providers, User Domain, User Service Profile Management, Auth Service JWT & OAuth. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139947/masst-docs/hld/leetcode/2-problem-management-system-00006d.png LeetCode · 2. Problem Management System · HLD Case Study | MASST Docs LeetCode — Problem Management System: flowchart covering Storage Layer, Content Management, Problem Domain, Problem Service CRUD Operations, Problem Catalog Search & Filter. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139956/masst-docs/hld/leetcode/3-code-execution-engine-00005c.png LeetCode · 3. Code Execution Engine · HLD Case Study | MASST Docs LeetCode — Code Execution Engine: flowchart covering Security Layer, Judge System, Execution Environment, Submission Flow, Code Submission. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139962/masst-docs/hld/leetcode/3-code-execution-engine-00007f.png LeetCode · 3. Code Execution Engine · HLD Case Study | MASST Docs LeetCode — Code Execution Engine: flowchart covering Resource Management, Language Runtimes, Container Orchestration, Container Manager, Container Pool. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139972/masst-docs/hld/leetcode/4-real-time-collaboration-system-00001f.png LeetCode · 4. Real-time Collaboration System · HLD Case Study | MASST Docs LeetCode — Real-time Collaboration System: flowchart covering Session Management, Real-time Infrastructure, Interview Platform, Interview Room Real-time Session, Code… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139977/masst-docs/hld/leetcode/5-contest-management-system-00003f.png LeetCode · 5. Contest Management System · HLD Case Study | MASST Docs LeetCode — Contest Management System: flowchart covering Infrastructure, Contest Types, Contest Domain, Contest Service Competition Logic, Real-time Ranking Leaderboard. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139983/masst-docs/hld/leetcode/1-postgresql-primary-database-000036.png LeetCode · 1. PostgreSQL (Primary Database) · HLD Case Study | MASST Docs LeetCode — PostgreSQL (Primary Database): flowchart covering Applications, Connection Pooling, Database Schemas, Master-Slave Setup, PostgreSQL Clusters. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139990/masst-docs/hld/leetcode/2-cassandra-submission-storage-000050.png LeetCode · 2. Cassandra (Submission Storage) · HLD Case Study | MASST Docs LeetCode — Cassandra (Submission Storage): flowchart covering Query Patterns, Keyspaces & Tables, Data Center 2 (EU-West), Data Center 1 (US-East), Cassandra Ring. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782139997/masst-docs/hld/leetcode/3-redis-cache-layer-000022.png LeetCode · 3. Redis Cache Layer · HLD Case Study | MASST Docs LeetCode — Redis Cache Layer: flowchart covering Applications, Cache Patterns, Redis Cluster, Redis Architecture, Master 1 User Sessions. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140002/masst-docs/hld/leetcode/4-mongodb-interview-data-00006c.png LeetCode · 4. MongoDB (Interview Data) · HLD Case Study | MASST Docs LeetCode — MongoDB (Interview Data): flowchart covering Indexing Strategy, Collections, MongoDB Replica Set, Primary Write Operations, Secondary Read Operations. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140008/masst-docs/hld/leetcode/1-code-execution-pipeline-000057.png LeetCode · 1. Code Execution Pipeline · HLD Case Study | MASST Docs LeetCode — Code Execution Pipeline: sequence diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140014/masst-docs/hld/leetcode/2-container-management-000027.png LeetCode · 2. Container Management · HLD Case Study | MASST Docs LeetCode — Container Management: flowchart covering Security Isolation, Execution Nodes, Container Orchestration, Container Manager Custom Scheduler, Container Pool Pre-warmed… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140023/masst-docs/hld/leetcode/3-judge-system-architecture-000029.png LeetCode · 3. Judge System Architecture · HLD Case Study | MASST Docs LeetCode — Judge System Architecture: flowchart covering Result Processing, Test Case Management, Judge Components, Judge Scheduler Load Balancing, Code Executor Runtime Engine. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140030/masst-docs/hld/leetcode/1-auto-scaling-strategy-00007c.png LeetCode · 1. Auto-scaling Strategy · HLD Case Study | MASST Docs LeetCode — Auto-scaling Strategy: flowchart covering Auto Scaling Groups, Scaling Triggers, Metrics Collection, CPU Utilization Target: 70%, Memory Usage Target: 80%. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140036/masst-docs/hld/leetcode/2-caching-strategy-000036.png LeetCode · 2. Caching Strategy · HLD Case Study | MASST Docs LeetCode — Caching Strategy: flowchart covering Cache Policies, Cache Layers, Browser Cache Static Assets, CDN Cache API Responses, Application Cache Redis Cluster. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140041/masst-docs/hld/leetcode/3-database-optimization-000041.png LeetCode · 3. Database Optimization · HLD Case Study | MASST Docs LeetCode — Database Optimization: flowchart covering Data Lifecycle, Write Optimization, Read Optimization, Read Replicas Geographic Distribution, Query Cache Frequently Accessed. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140046/masst-docs/hld/leetcode/1-multi-layer-security-000017.png LeetCode · 1. Multi-layer Security · HLD Case Study | MASST Docs LeetCode — Multi-layer Security: flowchart covering Data Security, Code Execution Security, Application Security, Network Security, Web Application Firewall. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140051/masst-docs/hld/leetcode/2-code-execution-security-00005b.png LeetCode · 2. Code Execution Security · HLD Case Study | MASST Docs LeetCode — Code Execution Security: flowchart covering Network Security, System Security, Container Security, Minimal Base Images Alpine Linux, Non-root User Execution. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140057/masst-docs/hld/leetcode/1-websocket-architecture-000036.png LeetCode · 1. WebSocket Architecture · HLD Case Study | MASST Docs LeetCode — WebSocket Architecture: flowchart covering Clients, Message Queue, Real-time Services, WebSocket Gateway, WebSocket Load Balancer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140063/masst-docs/hld/leetcode/2-operational-transform-000001.png LeetCode · 2. Operational Transform · HLD Case Study | MASST Docs LeetCode — Operational Transform: sequence diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140068/masst-docs/hld/leetcode/1-contest-infrastructure-000072.png LeetCode · 1. Contest Infrastructure · HLD Case Study | MASST Docs LeetCode — Contest Infrastructure: flowchart covering Analytics & Monitoring, Submission Handling, Problem Distribution, Contest Management, Contest Scheduler. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140074/masst-docs/hld/leetcode/2-anti-cheat-measures-000048.png LeetCode · 2. Anti-cheat Measures · HLD Case Study | MASST Docs LeetCode — Anti-cheat Measures: flowchart covering Response Actions, Machine Learning, Behavioral Analysis, Code Analysis, Code Similarity Detection. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140079/masst-docs/hld/leetcode/1-data-pipeline-000029.png LeetCode · 1. Data Pipeline · HLD Case Study | MASST Docs LeetCode — Data Pipeline: flowchart covering ML Pipeline, Data Storage, Event Processing, Event Generation, User Events Login, Navigation. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140090/masst-docs/hld/leetcode/2-machine-learning-applications-00006b.png LeetCode · 2. Machine Learning Applications · HLD Case Study | MASST Docs LeetCode — Machine Learning Applications: flowchart covering User Experience, Content Optimization, Performance Prediction, Recommendation Systems, Problem Recommendations. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140096/masst-docs/hld/leetcode/3-analytics-dashboard-000068.png LeetCode · 3. Analytics Dashboard · HLD Case Study | MASST Docs LeetCode — Analytics Dashboard: flowchart covering Operational Analytics, Business Analytics, System Analytics, User Analytics, User Engagement Metrics. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140114/masst-docs/hld/leetcode/1-comprehensive-monitoring-stack-000021.png LeetCode · 1. Comprehensive Monitoring Stack · HLD Case Study | MASST Docs LeetCode — Comprehensive Monitoring Stack: flowchart covering APM, Tracing, Logging, Metrics Collection, Prometheus Time Series DB. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140128/masst-docs/hld/leetcode/2-key-performance-indicators-000013.png LeetCode · 2. Key Performance Indicators · HLD Case Study | MASST Docs LeetCode — Key Performance Indicators: flowchart covering Infrastructure KPIs, Business KPIs, System Performance KPIs, User Experience KPIs, Response Time < 2 seconds. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140139/masst-docs/hld/leetcode/3-alerting-strategy-00004d.png LeetCode · 3. Alerting Strategy · HLD Case Study | MASST Docs LeetCode — Alerting Strategy: flowchart covering Response Teams, Notification Channels, Alert Severity Levels, P1 - Critical System Down, P2 - High Service Degraded. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140155/masst-docs/hld/leetcode/1-ci-cd-pipeline-00006d.png LeetCode · 1. CI/CD Pipeline · HLD Case Study | MASST Docs LeetCode — CI/CD Pipeline: flowchart covering Rollback Strategy, Deployment Pipeline, Build Pipeline, Source Control, GitHub Source Code. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140165/masst-docs/hld/leetcode/2-infrastructure-as-code-000008.png LeetCode · 2. Infrastructure as Code · HLD Case Study | MASST Docs LeetCode — Infrastructure as Code: flowchart covering Secret Management, GitOps, Environment Management, Infrastructure Management, Terraform Infrastructure Provisioning. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140170/masst-docs/hld/leetcode/3-container-orchestration-00002c.png LeetCode · 3. Container Orchestration · HLD Case Study | MASST Docs LeetCode — Container Orchestration: flowchart covering Storage, Networking, Workload Types, Kubernetes Cluster, Master Nodes Control Plane. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140180/masst-docs/hld/leetcode/1-multi-region-deployment-00006b.png LeetCode · 1. Multi-Region Deployment · HLD Case Study | MASST Docs LeetCode — Multi-Region Deployment: flowchart covering Global Services, Asia-Pacific, EU-Central, US-West (Secondary), US-East (Primary). Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140190/masst-docs/hld/leetcode/2-traffic-routing-strategy-00007a.png LeetCode · 2. Traffic Routing Strategy · HLD Case Study | MASST Docs LeetCode — Traffic Routing Strategy: flowchart covering Failover Logic, Load Balancing, DNS Resolution, User Request, DNS Query leetcode.com. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140200/masst-docs/hld/leetcode/1-database-optimization-000054.png LeetCode · 1. Database Optimization · HLD Case Study | MASST Docs LeetCode — Database Optimization: flowchart covering Data Lifecycle, Connection Optimization, Query Optimization, Strategic Indexing Query Performance, Table Partitioning Data… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140206/masst-docs/hld/leetcode/2-api-performance-00004c.png LeetCode · 2. API Performance · HLD Case Study | MASST Docs LeetCode — API Performance: flowchart covering Network Optimization, Caching Strategy, Response Optimization, Response Compression Gzip, Brotli, Smart Pagination Efficient Data… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140217/masst-docs/hld/leetcode/1-infrastructure-cost-management-000010.png LeetCode · 1. Infrastructure Cost Management · HLD Case Study | MASST Docs LeetCode — Infrastructure Cost Management: distribution chart covering Containers & VMs. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140223/masst-docs/hld/leetcode/1-infrastructure-cost-management-000064.png LeetCode · 1. Infrastructure Cost Management · HLD Case Study | MASST Docs LeetCode — Infrastructure Cost Management: flowchart covering Monitoring & Control, Network Optimization, Storage Optimization, Compute Optimization, Spot Instances 70% Cost… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140229/masst-docs/hld/leetcode/2-resource-efficiency-000033.png LeetCode · 2. Resource Efficiency · HLD Case Study | MASST Docs LeetCode — Resource Efficiency: flowchart covering Data Efficiency, Execution Efficiency, Container Optimization, Resource Limits CPU & Memory, Image Optimization Minimal Base… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140235/masst-docs/hld/leetcode/1-emerging-technologies-00007c.png LeetCode · 1. Emerging Technologies · HLD Case Study | MASST Docs LeetCode — Emerging Technologies: flowchart covering Platform Evolution, Advanced Collaboration, Next-Gen Execution, AI & ML Integration, AI Code Assistant Real-time Suggestions. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140240/masst-docs/hld/leetcode/2-scalability-roadmap-000029.png LeetCode · 2. Scalability Roadmap · HLD Case Study | MASST Docs LeetCode — Scalability Roadmap: architecture diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140245/masst-docs/hld/leetcode/1-backup-and-recovery-strategy-00005f.png LeetCode · 1. Backup and Recovery Strategy · HLD Case Study | MASST Docs LeetCode — Backup and Recovery Strategy: flowchart covering Recovery Scenarios, Storage Locations, Backup Types, Full Backup Weekly Schedule, Incremental Backup Daily Schedule. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140250/masst-docs/hld/leetcode/2-high-availability-design-00001d.png LeetCode · 2. High Availability Design · HLD Case Study | MASST Docs LeetCode — High Availability Design: flowchart covering Recovery Metrics, Redundancy Strategy, Availability Targets, Application Tier 99.95% Uptime, Data Tier 99.99% Uptime. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/netflix https://res.cloudinary.com/ddg380vsg/image/upload/v1782140255/masst-docs/hld/netflix/high-level-architecture-00005a.png Netflix · High-Level Architecture · HLD Case Study | MASST Docs Netflix — High-Level Architecture: flowchart covering Data Layer, Microservices Layer, API Gateway, CDN Layer (Open Connect), Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140261/masst-docs/hld/netflix/1-content-delivery-network-open-connect-000033.png Netflix · 1. Content Delivery Network (Open Connect) · HLD Case Study | MASST Docs Netflix — Content Delivery Network (Open Connect): flowchart covering End Users, Internet Exchange Points, ISP Locations, Regional Fill Sites, Netflix Origin. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140266/masst-docs/hld/netflix/2-api-gateway-zuul-000005.png Netflix · 2. API Gateway (Zuul) · HLD Case Study | MASST Docs Netflix — API Gateway (Zuul): sequence diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140271/masst-docs/hld/netflix/3-microservices-architecture-000056.png Netflix · 3. Microservices Architecture · HLD Case Study | MASST Docs Netflix — Microservices Architecture: flowchart covering External Dependencies, User Domain, User Service Authentication & Sessions, User Profile Preferences & Settings, User Auth… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140276/masst-docs/hld/netflix/3-microservices-architecture-00006c.png Netflix · 3. Microservices Architecture · HLD Case Study | MASST Docs Netflix — Microservices Architecture: flowchart covering Storage Layer, Content Domain, Content Service Main API, Metadata Manager Content Info, Rights Manager Licensing. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140281/masst-docs/hld/netflix/3-microservices-architecture-000024.png Netflix · 3. Microservices Architecture · HLD Case Study | MASST Docs Netflix — Microservices Architecture: flowchart covering ML Infrastructure, Recommendation Domain, Recommendation API Main Service, Rating Predictor ML Models, Trending Service… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140286/masst-docs/hld/netflix/3-microservices-architecture-000061.png Netflix · 3. Microservices Architecture · HLD Case Study | MASST Docs Netflix — Microservices Architecture: flowchart covering External Services, Billing Domain, Billing API Main Service, Payment Service Payment Processing, Subscription Service Plan… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140292/masst-docs/hld/netflix/3-microservices-architecture-00004d.png Netflix · 3. Microservices Architecture · HLD Case Study | MASST Docs Netflix — Microservices Architecture: flowchart covering Infrastructure, Playback Domain, Playback API Main Service, Video Service Stream Management, Quality Service Adaptive… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140301/masst-docs/hld/netflix/4-data-storage-architecture-000018.png Netflix · 4. Data Storage Architecture · HLD Case Study | MASST Docs Netflix — Data Storage Architecture: flowchart covering Applications, Data Types, Data Center 2 (EU-West), Data Center 1 (US-East), Cassandra Cluster. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140307/masst-docs/hld/netflix/4-data-storage-architecture-000073.png Netflix · 4. Data Storage Architecture · HLD Case Study | MASST Docs Netflix — Data Storage Architecture: flowchart covering Applications, Database Schemas, Master-Slave Setup, MySQL Architecture, Users Database Account Info. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140312/masst-docs/hld/netflix/4-data-storage-architecture-000051.png Netflix · 4. Data Storage Architecture · HLD Case Study | MASST Docs Netflix — Data Storage Architecture: flowchart covering Applications, Indices, Data Nodes, Master Nodes, Elasticsearch Cluster. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140317/masst-docs/hld/netflix/4-data-storage-architecture-000054.png Netflix · 4. Data Storage Architecture · HLD Case Study | MASST Docs Netflix — Data Storage Architecture: flowchart covering Applications, Data Types, Redis Cluster, Redis Architecture, Redis Node 1 Session Data. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140323/masst-docs/hld/netflix/4-data-storage-architecture-000015.png Netflix · 4. Data Storage Architecture · HLD Case Study | MASST Docs Netflix — Data Storage Architecture: flowchart covering Applications, Regions, Content Types, Storage Classes, S3 Storage Architecture. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140328/masst-docs/hld/netflix/5-stream-processing-architecture-00004f.png Netflix · 5. Stream Processing Architecture · HLD Case Study | MASST Docs Netflix — Stream Processing Architecture: flowchart covering ML Pipeline, Data Storage, Stream Processing, Message Queue, Data Sources. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140333/masst-docs/hld/netflix/1-horizontal-scaling-000028.png Netflix · 1. Horizontal Scaling · HLD Case Study | MASST Docs Netflix — Horizontal Scaling: flowchart covering Availability Zones, Database Sharding, Auto Scaling Group, Load Balancer, Application Load Balancer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140338/masst-docs/hld/netflix/2-caching-strategy-000003.png Netflix · 2. Caching Strategy · HLD Case Study | MASST Docs Netflix — Caching Strategy: flowchart covering Database Layer, Application Layer, CDN Layer, Client Side, Browser Cache. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140348/masst-docs/hld/netflix/3-circuit-breaker-pattern-000045.png Netflix · 3. Circuit Breaker Pattern · HLD Case Study | MASST Docs Netflix — Circuit Breaker Pattern: state machine. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140363/masst-docs/hld/netflix/security-architecture-00000c.png Netflix · Security Architecture · HLD Case Study | MASST Docs Netflix — Security Architecture: flowchart covering Monitoring & Response, Application Security, Infrastructure Security, Network Security, Client Security. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140373/masst-docs/hld/netflix/monitoring-and-observability-000018.png Netflix · Monitoring and Observability · HLD Case Study | MASST Docs Netflix — Monitoring and Observability: flowchart covering Response & Action, Analysis & Alerting, Processing & Storage, Data Collection, Applications Metrics & Logs. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140384/masst-docs/hld/netflix/continuous-integration-continuous-deployment-000034.png Netflix · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Netflix — Continuous Integration/Continuous Deployment: flowchart covering Rollback Strategy, Deployment Pipeline, Development, Code Commit, Build & Test. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140394/masst-docs/hld/netflix/chaos-engineering-00005a.png Netflix · Chaos Engineering · HLD Case Study | MASST Docs Netflix — Chaos Engineering: flowchart covering Response, Monitoring, Target Systems, Chaos Tools, Chaos Monkey Service Failures. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140398/masst-docs/hld/netflix/video-encoding-and-delivery-00005c.png Netflix · Video Encoding and Delivery · HLD Case Study | MASST Docs Netflix — Video Encoding and Delivery: flowchart covering Quality Levels, Client Delivery, Storage & CDN, Encoding Pipeline, Content Ingestion. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140404/masst-docs/hld/netflix/multi-region-deployment-000029.png Netflix · Multi-Region Deployment · HLD Case Study | MASST Docs Netflix — Multi-Region Deployment: flowchart covering Global Services, Latin America, Asia-Pacific, EU-West, US-East (Primary). Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140409/masst-docs/hld/netflix/disaster-recovery-000076.png Netflix · Disaster Recovery · HLD Case Study | MASST Docs Netflix — Disaster Recovery: flowchart covering Recovery Process, Monitoring, Secondary Region, Primary Region, Primary Services US-East-1. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140415/masst-docs/hld/netflix/data-pipeline-000027.png Netflix · Data Pipeline · HLD Case Study | MASST Docs Netflix — Data Pipeline: flowchart covering Applications, Machine Learning, Batch Processing, Real-time Processing, Event Generation. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140420/masst-docs/hld/netflix/cost-optimization-000041.png Netflix · Cost Optimization · HLD Case Study | MASST Docs Netflix — Cost Optimization: distribution chart. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140425/masst-docs/hld/netflix/cost-optimization-000026.png Netflix · Cost Optimization · HLD Case Study | MASST Docs Netflix — Cost Optimization: flowchart covering Monitoring & Analytics, Data Optimization, Content Delivery Optimization, Infrastructure Optimization, Reserved Instances 70% Cost… Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/news-feed https://res.cloudinary.com/ddg380vsg/image/upload/v1782140431/masst-docs/hld/news-feed-system-design/pull-model-fan-out-on-read-000043.png News Feed System Design · Pull Model (Fan-out on Read) · HLD Case Study | MASST Docs News Feed System Design — Pull Model (Fan-out on Read): flowchart covering User A requests feed, Feed Service, 1. Get A's following list: 91;B, C, D, E, F...93;, 2. For each… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140436/masst-docs/hld/news-feed-system-design/push-model-fan-out-on-write-000027.png News Feed System Design · Push Model (Fan-out on Write) · HLD Case Study | MASST Docs News Feed System Design — Push Model (Fan-out on Write): flowchart covering User B creates post, Feed Service, 1. Get B's followers: 91;A, X, Y, Z...93;, 2. For each follower, add… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140442/masst-docs/hld/news-feed-system-design/hybrid-approach-recommended-000019.png News Feed System Design · Hybrid Approach (Recommended) · HLD Case Study | MASST Docs News Feed System Design — Hybrid Approach (Recommended): flowchart covering Hybrid Strategy, Celebrity…, Regular users…, Feed Generation, 1. Get pre-computed feed…. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140454/masst-docs/hld/news-feed-system-design/high-level-architecture-00001a.png News Feed System Design · High-Level Architecture · HLD Case Study | MASST Docs News Feed System Design — High-Level Architecture: flowchart covering Load Balancer, Post Service, Feed Service, User Service, Posts DB…. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140463/masst-docs/hld/news-feed-system-design/publishing-a-post-000069.png News Feed System Design · Publishing a Post · HLD Case Study | MASST Docs News Feed System Design — Publishing a Post: flowchart covering 1. User creates post, 3. Fan-out Workers…, Check user type, <10K followers, >10K followers. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140469/masst-docs/hld/news-feed-system-design/reading-feed-00007f.png News Feed System Design · Reading Feed · HLD Case Study | MASST Docs News Feed System Design — Reading Feed: flowchart covering 1. User requests feed, 2. Feed Service, Get list of celebrities user follows, Fetch recent posts from celebrities…,… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140476/masst-docs/hld/news-feed-system-design/ranking-algorithm-000022.png News Feed System Design · Ranking Algorithm · HLD Case Study | MASST Docs News Feed System Design — Ranking Algorithm: flowchart covering Score = Affinity × PostWeight × TimeDecay, Affinity…, PostWeight…, TimeDecay…, 1 + age_hours^1.5. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140482/masst-docs/hld/news-feed-system-design/real-time-updates-000045.png News Feed System Design · Real-Time Updates · HLD Case Study | MASST Docs News Feed System Design — Real-Time Updates: flowchart covering WebSocket Server, Notification Service, Redis Pub/Sub. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140487/masst-docs/hld/news-feed-system-design/caching-strategy-000063.png News Feed System Design · Caching Strategy · HLD Case Study | MASST Docs News Feed System Design — Caching Strategy: flowchart covering L1: CDN…, L2: Application Cache…, L3: Feed Cache — Redis Cluster…, L4: Database…. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/notification-system https://res.cloudinary.com/ddg380vsg/image/upload/v1782140497/masst-docs/hld/notification-system/system-architecture-000009.png Notification System · System Architecture · HLD Case Study | MASST Docs Notification System — System Architecture: flowchart covering API Gateway, Notification Service, Message Queue…, Push Worker, SMS Worker. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140507/masst-docs/hld/notification-system/notification-service-00005d.png Notification System · Notification Service · HLD Case Study | MASST Docs Notification System — Notification Service: flowchart covering 1. Receive notification request, 2. Validate and enrich data, 3. Check user preferences, 4. Apply rate limiting, 5.… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140513/masst-docs/hld/notification-system/workers-00003e.png Notification System · Workers · HLD Case Study | MASST Docs Notification System — Workers: flowchart covering 1. Consume from queue, 2. Build notification…, 3. Call external provider, 4. Update delivery status, 5. Handle retries. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/pastebin https://res.cloudinary.com/ddg380vsg/image/upload/v1782140518/masst-docs/hld/pastebin-system-design/high-level-design-000064.png Pastebin System Design · High-Level Design · HLD Case Study | MASST Docs Pastebin System Design — High-Level Design: flowchart covering Load Balancer, Write Service…, Read Service…, Cache…, Object Storage…. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140524/masst-docs/hld/pastebin-system-design/read-flow-000078.png Pastebin System Design · Read Flow · HLD Case Study | MASST Docs Pastebin System Design — Read Flow: sequence diagram covering Redis. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140528/masst-docs/hld/pastebin-system-design/write-flow-000020.png Pastebin System Design · Write Flow · HLD Case Study | MASST Docs Pastebin System Design — Write Flow: sequence diagram covering short_url, content_hash. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140533/masst-docs/hld/pastebin-system-design/expiration-handling-000033.png Pastebin System Design · Expiration Handling · HLD Case Study | MASST Docs Pastebin System Design — Expiration Handling: flowchart covering Cleanup Service…, 2. For each expired paste, Delete from object storage, Delete from database, Invalidate cache. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140538/masst-docs/hld/pastebin-system-design/cdn-for-reads-00001e.png Pastebin System Design · CDN for Reads · HLD Case Study | MASST Docs Pastebin System Design — CDN for Reads: flowchart covering CDN…, Origin…. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/rate-limiter https://res.cloudinary.com/ddg380vsg/image/upload/v1782140543/masst-docs/hld/rate-limiter/system-architecture-00002c.png Rate Limiter · System Architecture · HLD Case Study | MASST Docs Rate Limiter — System Architecture: flowchart covering API Gateway, Rate Limiter Service, Redis Cluster…. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140548/masst-docs/hld/rate-limiter/solutions-00002a.png Rate Limiter · Solutions · HLD Case Study | MASST Docs Rate Limiter — Solutions: flowchart covering Server 1, Redis…, Server 2, Server 3. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/slack https://res.cloudinary.com/ddg380vsg/image/upload/v1782140553/masst-docs/hld/slack/high-level-architecture-000044.png Slack · High-Level Architecture · HLD Case Study | MASST Docs Slack — High-Level Architecture: flowchart covering Data Layer, Core Services, Gateway Layer, Edge Layer, Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140558/masst-docs/hld/slack/1-real-time-message-delivery-000004.png Slack · 1. Real-time Message Delivery · HLD Case Study | MASST Docs Slack — Real-time Message Delivery: flowchart covering Guarantees, Delivery, Event Processing, Message Send, Client Send Message. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140563/masst-docs/hld/slack/2-websocket-gateway-00004d.png Slack · 2. WebSocket Gateway · HLD Case Study | MASST Docs Slack — WebSocket Gateway: sequence diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140568/masst-docs/hld/slack/3-channel-architecture-000031.png Slack · 3. Channel Architecture · HLD Case Study | MASST Docs Slack — Channel Architecture: flowchart covering Access Control, Channel Data, Channel Types, Public Channels Org-wide Visibility, Private Channels Invite Only. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140573/masst-docs/hld/slack/4-presence-system-000071.png Slack · 4. Presence System · HLD Case Study | MASST Docs Slack — Presence System: flowchart covering Distribution, Presence Logic, Presence Sources, User Activity Keystrokes, Clicks, Calendar Integration Meetings. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140579/masst-docs/hld/slack/vitess-mysql-sharding-000004.png Slack · Vitess (MySQL Sharding) · HLD Case Study | MASST Docs Slack — Vitess (MySQL Sharding): flowchart covering Applications, Shard 2, Shard 1, VTTablet Layer, VTGate Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140583/masst-docs/hld/slack/redis-cache-presence-000051.png Slack · Redis (Cache & Presence) · HLD Case Study | MASST Docs Slack — Redis (Cache & Presence): flowchart covering Use Cases, Session Cluster, Cache Cluster, Presence Cluster, Redis Clusters. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140588/masst-docs/hld/slack/solr-search-infrastructure-000073.png Slack · Solr (Search Infrastructure) · HLD Case Study | MASST Docs Slack — Solr (Search Infrastructure): flowchart covering Search Features, Solr Cluster, Index Pipeline, Search Architecture, Message Indexer Real-time. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140594/masst-docs/hld/slack/stream-processing-architecture-000036.png Slack · Stream Processing Architecture · HLD Case Study | MASST Docs Slack — Stream Processing Architecture: flowchart covering Consumers, Apache Kafka, Event Sources, Message Events, User Events. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140599/masst-docs/hld/slack/1-connection-scaling-000057.png Slack · 1. Connection Scaling · HLD Case Study | MASST Docs Slack — Connection Scaling: flowchart covering Capacity, Scaling Strategy, Connection Tiers, Tier 1: Edge SSL Termination, Tier 2: Gateway Protocol Handling. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140604/masst-docs/hld/slack/2-message-fanout-00003d.png Slack · 2. Message Fanout · HLD Case Study | MASST Docs Slack — Message Fanout: flowchart covering Broadcast Channels, Large Channels, Small Channels, < 100 Members, Direct Fanout All at Once. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140614/masst-docs/hld/slack/3-database-sharding-000013.png Slack · 3. Database Sharding · HLD Case Study | MASST Docs Slack — Database Sharding: flowchart covering Shard Routing, Sharding Strategy, Shard by Workspace Primary Strategy, Shard by Channel Large Workspaces, Shard by Time Message… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140623/masst-docs/hld/slack/security-architecture-000033.png Slack · Security Architecture · HLD Case Study | MASST Docs Slack — Security Architecture: flowchart covering Compliance, Data Protection, Authorization, Authentication, SAML SSO Enterprise. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140629/masst-docs/hld/slack/monitoring-and-observability-00004d.png Slack · Monitoring and Observability · HLD Case Study | MASST Docs Slack — Monitoring and Observability: flowchart covering Response, Analysis, Collection, Prometheus Time Series, Jaeger Distributed Tracing. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140634/masst-docs/hld/slack/continuous-integration-continuous-deployment-00003e.png Slack · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Slack — Continuous Integration/Continuous Deployment: architecture diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140639/masst-docs/hld/slack/continuous-integration-continuous-deployment-00006e.png Slack · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Slack — Continuous Integration/Continuous Deployment: flowchart covering Safety, Deployment, Development, Code Commit GitHub, Build & Test Jenkins. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140644/masst-docs/hld/slack/chaos-engineering-000066.png Slack · Chaos Engineering · HLD Case Study | MASST Docs Slack — Chaos Engineering: flowchart covering Learning, Measurement, Targets, Chaos Experiments, Network Partition AZ Failure. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140650/masst-docs/hld/slack/data-pipeline-000070.png Slack · Data Pipeline · HLD Case Study | MASST Docs Slack — Data Pipeline: flowchart covering ML Applications, Processing, Event Collection, User Events Actions, Navigation, Message Events Sends, Reads. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140661/masst-docs/hld/slack/cost-optimization-000073.png Slack · Cost Optimization · HLD Case Study | MASST Docs Slack — Cost Optimization: distribution chart. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140666/masst-docs/hld/slack/cost-optimization-000015.png Slack · Cost Optimization · HLD Case Study | MASST Docs Slack — Cost Optimization: flowchart covering Network Optimization, Storage Optimization, Compute Optimization, Spot Instances Batch Processing, Reserved Capacity Real-time… Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/stripe https://res.cloudinary.com/ddg380vsg/image/upload/v1782140672/masst-docs/hld/stripe/high-level-architecture-00000b.png Stripe · High-Level Architecture · HLD Case Study | MASST Docs Stripe — High-Level Architecture: flowchart covering Data Layer, Core Services, API Gateway, Edge Layer, Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140678/masst-docs/hld/stripe/1-payment-processing-pipeline-00002e.png Stripe · 1. Payment Processing Pipeline · HLD Case Study | MASST Docs Stripe — Payment Processing Pipeline: flowchart covering Settlement, Authorization, Risk Assessment, Payment Initiation, Create PaymentIntent. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140683/masst-docs/hld/stripe/2-subscription-billing-engine-00006e.png Stripe · 2. Subscription & Billing Engine · HLD Case Study | MASST Docs Stripe — Subscription & Billing Engine: sequence diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140693/masst-docs/hld/stripe/3-fraud-detection-radar-000041.png Stripe · 3. Fraud Detection (Radar) · HLD Case Study | MASST Docs Stripe — Fraud Detection (Radar): flowchart covering Decision, ML Models, Feature Engineering, Data Collection, Device Fingerprint Browser, Mobile. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140703/masst-docs/hld/stripe/4-payout-system-00003d.png Stripe · 4. Payout System · HLD Case Study | MASST Docs Stripe — Payout System: flowchart covering Reconciliation, Bank Integration, Payout Processing, Balance Management, Available Balance Ready for Payout. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140709/masst-docs/hld/stripe/postgresql-primary-database-00003f.png Stripe · PostgreSQL (Primary Database) · HLD Case Study | MASST Docs Stripe — PostgreSQL (Primary Database): flowchart covering Applications, Sharding, Read Path, Write Path, PostgreSQL Architecture. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140714/masst-docs/hld/stripe/redis-caching-queues-000073.png Stripe · Redis (Caching & Queues) · HLD Case Study | MASST Docs Stripe — Redis (Caching & Queues): flowchart covering Applications, Queue Layer, Cache Layer, Redis Cluster, Rate Limit Counters API Throttling. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140719/masst-docs/hld/stripe/apache-kafka-event-streaming-000031.png Stripe · Apache Kafka (Event Streaming) · HLD Case Study | MASST Docs Stripe — Apache Kafka (Event Streaming): flowchart covering Consumers, Kafka Cluster, Producers, Payment Events, Customer Events. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140725/masst-docs/hld/stripe/stream-processing-architecture-00006e.png Stripe · Stream Processing Architecture · HLD Case Study | MASST Docs Stripe — Stream Processing Architecture: flowchart covering Batch Systems, Real-time Systems, Stream Processing, Event Sources, API Events Charges, Refunds. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140735/masst-docs/hld/stripe/1-api-rate-limiting-000040.png Stripe · 1. API Rate Limiting · HLD Case Study | MASST Docs Stripe — API Rate Limiting: flowchart covering Response, Implementation, Rate Limit Tiers, Test Mode 25 req/sec, Live Mode 100 req/sec. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140741/masst-docs/hld/stripe/2-idempotency-000014.png Stripe · 2. Idempotency · HLD Case Study | MASST Docs Stripe — Idempotency: sequence diagram covering Idempotency-Key: abc123, 24h TTL. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140747/masst-docs/hld/stripe/3-geographic-distribution-000049.png Stripe · 3. Geographic Distribution · HLD Case Study | MASST Docs Stripe — Geographic Distribution: flowchart covering Global Services, APAC Region, EU Region, US Region, Load Balancer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140753/masst-docs/hld/stripe/security-architecture-000050.png Stripe · Security Architecture · HLD Case Study | MASST Docs Stripe — Security Architecture: flowchart covering Fraud Prevention, Infrastructure, API Security, PCI DSS Compliance, Tokenization No Raw Card Data. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140758/masst-docs/hld/stripe/monitoring-and-observability-000049.png Stripe · Monitoring and Observability · HLD Case Study | MASST Docs Stripe — Monitoring and Observability: flowchart covering Response, Alerting, Processing, Data Collection, Prometheus Metrics Service Health. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140763/masst-docs/hld/stripe/continuous-integration-continuous-deployment-00003e.png Stripe · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Stripe — Continuous Integration/Continuous Deployment: architecture diagram covering Sorbet. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140769/masst-docs/hld/stripe/continuous-integration-continuous-deployment-00007e.png Stripe · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs Stripe — Continuous Integration/Continuous Deployment: flowchart covering Rollback, Deploy, Build, Development, Code Commit GitHub. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140774/masst-docs/hld/stripe/chaos-engineering-000000.png Stripe · Chaos Engineering · HLD Case Study | MASST Docs Stripe — Chaos Engineering: flowchart covering Learning, Observation, Target Systems, Chaos Experiments, Network Partition Cross-region Failure. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140779/masst-docs/hld/stripe/data-pipeline-00006c.png Stripe · Data Pipeline · HLD Case Study | MASST Docs Stripe — Data Pipeline: flowchart covering ML Applications, Storage, Processing, Event Sources, Transaction Events Charges, Refunds. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140784/masst-docs/hld/stripe/cost-optimization-000056.png Stripe · Cost Optimization · HLD Case Study | MASST Docs Stripe — Cost Optimization: distribution chart. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140789/masst-docs/hld/stripe/cost-optimization-000072.png Stripe · Cost Optimization · HLD Case Study | MASST Docs Stripe — Cost Optimization: flowchart covering Efficiency, Storage Optimization, Network Optimization, Compute Optimization, Auto-scaling Traffic Patterns. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/ticket-booking https://res.cloudinary.com/ddg380vsg/image/upload/v1782140794/masst-docs/hld/ticket-booking-system-design/high-level-architecture-00005e.png Ticket Booking System Design · High-Level Architecture · HLD Case Study | MASST Docs Ticket Booking System Design — High-Level Architecture: flowchart covering Clients…, API Gateway…, Search Service, Booking Service, Payment Service. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140800/masst-docs/hld/ticket-booking-system-design/distributed-lock-with-redis-000045.png Ticket Booking System Design · Distributed Lock with Redis · HLD Case Study | MASST Docs Ticket Booking System Design — Distributed Lock with Redis: flowchart covering 1. User selects seats 91;A1, A2, A393;, 2. Try SETNX lock:show_123:A* user_456 EX 600 for each seat,… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140806/masst-docs/hld/ticket-booking-system-design/handling-high-traffic-hot-shows-000004.png Ticket Booking System Design · Handling High Traffic (Hot Shows) · HLD Case Study | MASST Docs Ticket Booking System Design — Handling High Traffic (Hot Shows): flowchart covering Virtual Waiting Queue…, 3. WebSocket updates — notify when turn, show position. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140817/masst-docs/hld/ticket-booking-system-design/payment-integration-000051.png Ticket Booking System Design · Payment Integration · HLD Case Study | MASST Docs Ticket Booking System Design — Payment Integration: flowchart covering 2. User completes payment…, 3. Payment Webhook receives confirmation, Result, Release seat holds, update to… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140822/masst-docs/hld/ticket-booking-system-design/caching-strategy-00003a.png Ticket Booking System Design · Caching Strategy · HLD Case Study | MASST Docs Ticket Booking System Design — Caching Strategy: flowchart covering CDN…, Application Cache…. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140827/masst-docs/hld/ticket-booking-system-design/notification-system-000035.png Ticket Booking System Design · Notification System · HLD Case Study | MASST Docs Ticket Booking System Design — Notification System: flowchart covering Notification Types, Booking Confirmed: email + QR, SMS with booking ID, push, Reminder: 24h before show, 2h… Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/twitter https://res.cloudinary.com/ddg380vsg/image/upload/v1782140832/masst-docs/hld/twitter-x/high-level-architecture-000002.png Twitter/X · High-Level Architecture · HLD Case Study | MASST Docs Twitter/X — High-Level Architecture: flowchart covering Data Layer, Core Services, API Gateway Layer, Edge Layer, Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140838/masst-docs/hld/twitter-x/1-tweet-distribution-system-000035.png Twitter/X · 1. Tweet Distribution System · HLD Case Study | MASST Docs Twitter/X — Tweet Distribution System: flowchart covering Storage, Timeline Distribution, Fanout Service, Tweet Creation, User Posts Tweet. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140845/masst-docs/hld/twitter-x/2-timeline-service-architecture-00006d.png Twitter/X · 2. Timeline Service Architecture · HLD Case Study | MASST Docs Twitter/X — Timeline Service Architecture: flowchart covering Storage, Cache Layers, Ranking & Filtering, Timeline Types, Home Timeline Following Feed. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140855/masst-docs/hld/twitter-x/3-real-time-search-architecture-000014.png Twitter/X · 3. Real-Time Search Architecture · HLD Case Study | MASST Docs Twitter/X — Real-Time Search Architecture: flowchart covering Result Aggregation, Query Processing, Search Index, Ingestion Pipeline, Tweet Stream. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140862/masst-docs/hld/twitter-x/4-user-service-000048.png Twitter/X · 4. User Service · HLD Case Study | MASST Docs Twitter/X — User Service: flowchart covering Security, Storage, Social Graph, User Management, Authentication OAuth 2.0. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140870/masst-docs/hld/twitter-x/5-direct-message-service-000029.png Twitter/X · 5. Direct Message Service · HLD Case Study | MASST Docs Twitter/X — Direct Message Service: flowchart covering Features, Storage, Real-time Delivery, Message Flow, Compose DM. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140876/masst-docs/hld/twitter-x/6-notification-service-000060.png Twitter/X · 6. Notification Service · HLD Case Study | MASST Docs Twitter/X — Notification Service: flowchart covering Storage, Delivery Channels, Notification Pipeline, Event Sources, New Tweet. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140881/masst-docs/hld/twitter-x/1-manhattan-distributed-key-value-store-000021.png Twitter/X · 1. Manhattan (Distributed Key-Value Store) · HLD Case Study | MASST Docs Twitter/X — Manhattan (Distributed Key-Value Store): flowchart covering Replication, Storage Layer, Frontend Layer, Manhattan Architecture, Client Libraries. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140886/masst-docs/hld/twitter-x/2-mysql-clusters-000006.png Twitter/X · 2. MySQL Clusters · HLD Case Study | MASST Docs Twitter/X — MySQL Clusters: flowchart covering Data Types, Shard N, Shard 2, Shard 1, Sharded MySQL. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140892/masst-docs/hld/twitter-x/3-redis-cache-architecture-000029.png Twitter/X · 3. Redis Cache Architecture · HLD Case Study | MASST Docs Twitter/X — Redis Cache Architecture: flowchart covering Data Types, Counter Caches, Session Store, Timeline Caches, Redis Cluster. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140901/masst-docs/hld/twitter-x/4-cassandra-000012.png Twitter/X · 4. Cassandra · HLD Case Study | MASST Docs Twitter/X — Cassandra: flowchart covering Data Types, Cassandra Ring, Node 1 Token Range 1, Node 2 Token Range 2, Node 3 Token Range 3. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140906/masst-docs/hld/twitter-x/5-hadoop-hdfs-000012.png Twitter/X · 5. Hadoop HDFS · HLD Case Study | MASST Docs Twitter/X — Hadoop HDFS: flowchart covering Data Types, Processing, DataNodes, HDFS Architecture, NameNode Metadata. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140916/masst-docs/hld/twitter-x/1-tweet-write-path-00006a.png Twitter/X · 1. Tweet Write Path · HLD Case Study | MASST Docs Twitter/X — Tweet Write Path: sequence diagram covering Push Fanout, 200 OK, Pull Fanout. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140922/masst-docs/hld/twitter-x/2-timeline-read-path-00003a.png Twitter/X · 2. Timeline Read Path · HLD Case Study | MASST Docs Twitter/X — Timeline Read Path: sequence diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140930/masst-docs/hld/twitter-x/3-horizontal-scaling-00002a.png Twitter/X · 3. Horizontal Scaling · HLD Case Study | MASST Docs Twitter/X — Horizontal Scaling: flowchart covering Asia-Pacific Cluster, EU-West Cluster, US-East Cluster, Load Distribution, Global Load Balancer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140935/masst-docs/hld/twitter-x/4-caching-strategy-000057.png Twitter/X · 4. Caching Strategy · HLD Case Study | MASST Docs Twitter/X — Caching Strategy: flowchart covering Cache Policies, Cache Layers, CDN Cache Static Assets, Edge Cache API Responses, Application Cache Redis. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140946/masst-docs/hld/twitter-x/1-live-streaming-architecture-00003f.png Twitter/X · 1. Live Streaming Architecture · HLD Case Study | MASST Docs Twitter/X — Live Streaming Architecture: flowchart covering Chat & Interaction, Distribution, Broadcast Pipeline, Live Video Source, Periscope Ingest. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140951/masst-docs/hld/twitter-x/2-trending-topics-000020.png Twitter/X · 2. Trending Topics · HLD Case Study | MASST Docs Twitter/X — Trending Topics: flowchart covering Output, Ranking, Processing, Data Collection, Tweet Stream. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140958/masst-docs/hld/twitter-x/3-real-time-recommendations-000050.png Twitter/X · 3. Real-Time Recommendations · HLD Case Study | MASST Docs Twitter/X — Real-Time Recommendations: flowchart covering Model Serving, Feature Generation, Signal Collection, User Actions, Social Graph. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140972/masst-docs/hld/twitter-x/1-ml-pipeline-00000c.png Twitter/X · 1. ML Pipeline · HLD Case Study | MASST Docs Twitter/X — ML Pipeline: flowchart covering Model Serving, Model Training, Feature Engineering, Data Collection, User Events Clicks, Likes, RT. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140981/masst-docs/hld/twitter-x/2-content-safety-moderation-000013.png Twitter/X · 2. Content Safety & Moderation · HLD Case Study | MASST Docs Twitter/X — Content Safety & Moderation: flowchart covering Action, Analysis, Detection Pipeline, User Content, Text Classification. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140987/masst-docs/hld/twitter-x/security-architecture-000068.png Twitter/X · Security Architecture · HLD Case Study | MASST Docs Twitter/X — Security Architecture: flowchart covering Account Security, Data Security, Infrastructure Security, API Security, Client Security. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782140996/masst-docs/hld/twitter-x/monitoring-observability-00002d.png Twitter/X · Monitoring & Observability · HLD Case Study | MASST Docs Twitter/X — Monitoring & Observability: flowchart covering Action, Analysis, Aggregation, Data Collection, Applications. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141005/masst-docs/hld/twitter-x/1-multi-cloud-architecture-000034.png Twitter/X · 1. Multi-Cloud Architecture · HLD Case Study | MASST Docs Twitter/X — Multi-Cloud Architecture: flowchart covering Global Load Balancer, Edge Locations, On-Premise, AWS, Google Cloud Platform. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141010/masst-docs/hld/twitter-x/2-deployment-pipeline-000072.png Twitter/X · 2. Deployment Pipeline · HLD Case Study | MASST Docs Twitter/X — Deployment Pipeline: flowchart covering Rollback, Production, Staging, Development, Code Commit Git. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141016/masst-docs/hld/twitter-x/3-infrastructure-as-code-000024.png Twitter/X · 3. Infrastructure as Code · HLD Case Study | MASST Docs Twitter/X — Infrastructure as Code: flowchart covering Automation, Version Control, IaC Tools, Terraform Infrastructure Provisioning, Ansible Configuration Management. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141022/masst-docs/hld/twitter-x/4-disaster-recovery-000024.png Twitter/X · 4. Disaster Recovery · HLD Case Study | MASST Docs Twitter/X — Disaster Recovery: flowchart covering Failover Process, Backup Region (EU), Secondary Region (US-West), Primary Region (US-East), API Services. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141031/masst-docs/hld/twitter-x/1-timeline-generation-performance-00007e.png Twitter/X · 1. Timeline Generation Performance · HLD Case Study | MASST Docs Twitter/X — Timeline Generation Performance: flowchart covering Performance Targets, Optimization Techniques, Prefetch Following Users' Tweets, Parallel Fetch Multiple Sources,… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141036/masst-docs/hld/twitter-x/2-media-optimization-00007c.png Twitter/X · 2. Media Optimization · HLD Case Study | MASST Docs Twitter/X — Media Optimization: flowchart covering Delivery, Processing, Upload Pipeline, User Upload, Validation & Virus Scan. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141041/masst-docs/hld/twitter-x/3-database-query-optimization-000009.png Twitter/X · 3. Database Query Optimization · HLD Case Study | MASST Docs Twitter/X — Database Query Optimization: flowchart covering Monitoring, Caching, Query Strategies, Strategic Indexing, Denormalization. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141046/masst-docs/hld/twitter-x/1-cdn-architecture-000028.png Twitter/X · 1. CDN Architecture · HLD Case Study | MASST Docs Twitter/X — CDN Architecture: flowchart covering Content Types, CDN Edge Network, Origin Servers, Origin Storage S3/GCS, US East Edge. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141055/masst-docs/hld/twitter-x/2-asset-pipeline-000073.png Twitter/X · 2. Asset Pipeline · HLD Case Study | MASST Docs Twitter/X — Asset Pipeline: flowchart covering Distribution, Optimization, Development, Source Assets, Minification. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141061/masst-docs/hld/twitter-x/1-analytics-pipeline-000067.png Twitter/X · 1. Analytics Pipeline · HLD Case Study | MASST Docs Twitter/X — Analytics Pipeline: flowchart covering Visualization, Storage, Processing, Collection, Data Sources. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141066/masst-docs/hld/twitter-x/2-key-performance-indicators-000004.png Twitter/X · 2. Key Performance Indicators · HLD Case Study | MASST Docs Twitter/X — Key Performance Indicators: flowchart covering Business Metrics, Technical Metrics, Content Metrics, User Metrics, Daily Active Users. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141080/masst-docs/hld/twitter-x/1-mobile-app-architecture-000065.png Twitter/X · 1. Mobile App Architecture · HLD Case Study | MASST Docs Twitter/X — Mobile App Architecture: flowchart covering Features, Local Storage, Networking, Client Layer, iOS App Swift. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141085/masst-docs/hld/twitter-x/2-push-notification-system-00005d.png Twitter/X · 2. Push Notification System · HLD Case Study | MASST Docs Twitter/X — Push Notification System: flowchart covering Client, Delivery, Processing, Event Triggers, New Mention. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141090/masst-docs/hld/twitter-x/cost-optimization-000040.png Twitter/X · Cost Optimization · HLD Case Study | MASST Docs Twitter/X — Cost Optimization: distribution chart covering Servers. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141095/masst-docs/hld/twitter-x/optimization-strategies-000079.png Twitter/X · Optimization Strategies · HLD Case Study | MASST Docs Twitter/X — Optimization Strategies: flowchart covering Monitoring, Network Optimization, Storage Optimization, Compute Optimization, Right-sizing Instances. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141100/masst-docs/hld/twitter-x/1-rest-api-00003b.png Twitter/X · 1. REST API · HLD Case Study | MASST Docs Twitter/X — REST API: flowchart covering Features, Endpoints, API Versions, API v1.1 Legacy, API v2 Current. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141110/masst-docs/hld/twitter-x/2-graphql-api-00000c.png Twitter/X · 2. GraphQL API · HLD Case Study | MASST Docs Twitter/X — GraphQL API: flowchart covering Response, Data Sources, GraphQL Server, Client Request, GraphQL Query. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141115/masst-docs/hld/twitter-x/ads-platform-architecture-000004.png Twitter/X · Ads Platform Architecture · HLD Case Study | MASST Docs Twitter/X — Ads Platform Architecture: flowchart covering Optimization, Delivery, Ad Serving, Ad Creation, Advertisers. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141120/masst-docs/hld/twitter-x/emerging-technologies-00001d.png Twitter/X · Emerging Technologies · HLD Case Study | MASST Docs Twitter/X — Emerging Technologies: flowchart covering Privacy & Security, Features, Infrastructure, AI/ML Enhancements, Large Language Models Content Moderation. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/typeahead https://res.cloudinary.com/ddg380vsg/image/upload/v1782141128/masst-docs/hld/typeahead-autocomplete-system-design/high-level-architecture-000068.png Typeahead / Autocomplete System Design · High-Level Architecture · HLD Case Study | MASST Docs Typeahead / Autocomplete System Design — High-Level Architecture: flowchart covering Client…, API Gateway…, Suggestion Service Cluster, Node 1…, Node 2…. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141134/masst-docs/hld/typeahead-autocomplete-system-design/scoring-ranking-00000c.png Typeahead / Autocomplete System Design · Scoring & Ranking · HLD Case Study | MASST Docs Typeahead / Autocomplete System Design — Scoring & Ranking: flowchart covering Score = w1·frequency + w2·recency + w3·personalization, Frequency Score: global search count,… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141141/masst-docs/hld/typeahead-autocomplete-system-design/data-collection-pipeline-00003d.png Typeahead / Autocomplete System Design · Data Collection Pipeline · HLD Case Study | MASST Docs Typeahead / Autocomplete System Design — Data Collection Pipeline: flowchart covering 1. User searches 'best restaurants', 2. Log to Kafka — 123;query, timestamp, user,… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141146/masst-docs/hld/typeahead-autocomplete-system-design/trend-detection-000024.png Typeahead / Autocomplete System Design · Trend Detection · HLD Case Study | MASST Docs Typeahead / Autocomplete System Design — Trend Detection: flowchart covering Trend Detection…, Compare: current 5-min count vs historical average, current much greater than… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141150/masst-docs/hld/typeahead-autocomplete-system-design/trie-sharding-000007.png Typeahead / Autocomplete System Design · Trie Sharding · HLD Case Study | MASST Docs Typeahead / Autocomplete System Design — Trie Sharding: flowchart covering Shard A-F: 'apple', 'amazon', Shard G-M: 'google', 'hello', Shard N-Z: 'netflix', 'python'. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782069647/masst-docs/hld/typeahead-autocomplete-system-design/trie-sharding-000054.png Typeahead / Autocomplete System Design · Trie Sharding · HLD Case Study | MASST Docs Typeahead / Autocomplete System Design — Trie Sharding: flowchart covering Replica 1…, Replica 2…, Replica 3…. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141160/masst-docs/hld/typeahead-autocomplete-system-design/handling-multi-language-000015.png Typeahead / Autocomplete System Design · Handling Multi-Language · HLD Case Study | MASST Docs Typeahead / Autocomplete System Design — Handling Multi-Language: flowchart covering Query, Language Detection: user locale, character analysis…, English Trie, Spanish Trie,… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141165/masst-docs/hld/typeahead-autocomplete-system-design/fault-tolerance-00007a.png Typeahead / Autocomplete System Design · Fault Tolerance · HLD Case Study | MASST Docs Typeahead / Autocomplete System Design — Fault Tolerance: flowchart covering Failure Handling, Trie Replication: 3x, across availability zones, Fallback Hierarchy: 1. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/uber https://res.cloudinary.com/ddg380vsg/image/upload/v1782141170/masst-docs/hld/uber/high-level-architecture-000044.png Uber · High-Level Architecture · HLD Case Study | MASST Docs Uber — High-Level Architecture: flowchart covering Data Layer, Real-time Systems, Core Services, Edge & Gateway, Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141181/masst-docs/hld/uber/1-dispatch-system-000062.png Uber · 1. Dispatch System · HLD Case Study | MASST Docs Uber — Dispatch System: flowchart covering Dispatch Actions, Matching Criteria, Dispatch Engine, Request Processing, Ride Request User Input. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141189/masst-docs/hld/uber/2-location-service-h3-geospatial-000068.png Uber · 2. Location Service (H3 & Geospatial) · HLD Case Study | MASST Docs Uber — Location Service (H3 & Geospatial): flowchart covering Storage, Geospatial Operations, H3 Hexagonal Grid, Location Collection, Driver GPS Every 4 seconds. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141195/masst-docs/hld/uber/3-pricing-engine-surge-pricing-000028.png Uber · 3. Pricing Engine (Surge Pricing) · HLD Case Study | MASST Docs Uber — Pricing Engine (Surge Pricing): flowchart covering Price Optimization, Surge Calculation, Dynamic Pricing, Pricing Inputs, Base Fare Product Config. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141202/masst-docs/hld/uber/4-eta-prediction-service-000058.png Uber · 4. ETA Prediction Service · HLD Case Study | MASST Docs Uber — ETA Prediction Service: flowchart covering ML Models, Traffic Modeling, Routing Engine, ETA Types, Pickup ETA Driver to Rider. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141212/masst-docs/hld/uber/5-payment-service-00002e.png Uber · 5. Payment Service · HLD Case Study | MASST Docs Uber — Payment Service: flowchart covering Reconciliation, Processing, Payment Flow, Payment Methods, Credit/Debit Card Tokenized. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141221/masst-docs/hld/uber/6-trip-lifecycle-management-00001e.png Uber · 6. Trip Lifecycle Management · HLD Case Study | MASST Docs Uber — Trip Lifecycle Management: flowchart covering Post-Trip, Trip Data, Trip Events, Trip States, Created Request Initiated. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141231/masst-docs/hld/uber/1-schemaless-mysql-sharding-000004.png Uber · 1. Schemaless (MySQL Sharding) · HLD Case Study | MASST Docs Uber — Schemaless (MySQL Sharding): flowchart covering Schema Evolution, Data Layer, MySQL Clusters, Shard Strategy, Schemaless Architecture. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141236/masst-docs/hld/uber/2-cassandra-location-events-00006c.png Uber · 2. Cassandra (Location & Events) · HLD Case Study | MASST Docs Uber — Cassandra (Location & Events): flowchart covering Query Patterns, Tables, Keyspaces, Cassandra Cluster, Datacenter 1 US. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141247/masst-docs/hld/uber/3-redis-real-time-state-00000c.png Uber · 3. Redis (Real-time State) · HLD Case Study | MASST Docs Uber — Redis (Real-time State): flowchart covering Use Cases, Data Structures, Redis Clusters, Supply Cluster Driver Availability, Session Cluster User State. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141252/masst-docs/hld/uber/4-kafka-event-streaming-000043.png Uber · 4. Kafka (Event Streaming) · HLD Case Study | MASST Docs Uber — Kafka (Event Streaming): flowchart covering Stream Processing, Consumers, Producers, Kafka Topics, location-updates GPS Events. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141263/masst-docs/hld/uber/1-ringpop-consistent-hashing-000038.png Uber · 1. Ringpop (Consistent Hashing) · HLD Case Study | MASST Docs Uber — Ringpop (Consistent Hashing): flowchart covering Failure Handling, Sharding, Hash Ring, Ringpop Cluster, Node 1 Dispatch Worker. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141268/masst-docs/hld/uber/2-real-time-location-tracking-000014.png Uber · 2. Real-time Location Tracking · HLD Case Study | MASST Docs Uber — Real-time Location Tracking: sequence diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141273/masst-docs/hld/uber/1-city-based-isolation-00004e.png Uber · 1. City-based Isolation · HLD Case Study | MASST Docs Uber — City-based Isolation: flowchart covering Benefits, Shared Services, Per-City Services, City Architecture, New York City Isolated Stack. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141283/masst-docs/hld/uber/2-performance-optimization-000079.png Uber · 2. Performance Optimization · HLD Case Study | MASST Docs Uber — Performance Optimization: flowchart covering Targets, Data Optimization, Server Optimization, Client Optimization, Batch GPS Updates Reduce API Calls. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141289/masst-docs/hld/uber/1-safety-features-000037.png Uber · 1. Safety Features · HLD Case Study | MASST Docs Uber — Safety Features: flowchart covering Platform Safety, Trip Safety, Driver Safety, Rider Safety, Share Trip Live Location. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141297/masst-docs/hld/uber/2-security-architecture-000058.png Uber · 2. Security Architecture · HLD Case Study | MASST Docs Uber — Security Architecture: flowchart covering Infrastructure, API Security, Data Protection, Authentication, OAuth 2.0 Token Auth. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141307/masst-docs/hld/uber/1-metrics-dashboards-00001d.png Uber · 1. Metrics & Dashboards · HLD Case Study | MASST Docs Uber — Metrics & Dashboards: flowchart covering Alerting, Infrastructure Metrics, Performance Metrics, Business Metrics, Trips/Minute Request Volume. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141311/masst-docs/hld/uber/1-continuous-deployment-pipeline-000038.png Uber · 1. Continuous Deployment Pipeline · HLD Case Study | MASST Docs Uber — Continuous Deployment Pipeline: flowchart covering Rollback Strategy, Deployment Pipeline, Development, Code Commit, Build & Test. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141317/masst-docs/hld/uber/3-chaos-engineering-000007.png Uber · 3. Chaos Engineering · HLD Case Study | MASST Docs Uber — Chaos Engineering: flowchart covering Response, Monitoring, Target Systems, Chaos Tools, City Outage Regional Failure. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141322/masst-docs/hld/uber/1-ml-platform-michelangelo-000034.png Uber · 1. ML Platform (Michelangelo) · HLD Case Study | MASST Docs Uber — ML Platform (Michelangelo): flowchart covering Model Serving, Model Training, Feature Engineering, Data Collection, Trip Data GPS, Duration, Fare. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141332/masst-docs/hld/uber/1-infrastructure-cost-distribution-000049.png Uber · 1. Infrastructure Cost Distribution · HLD Case Study | MASST Docs Uber — Infrastructure Cost Distribution: distribution chart covering Containers, VMs. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141338/masst-docs/hld/uber/2-cost-optimization-strategies-00002e.png Uber · 2. Cost Optimization Strategies · HLD Case Study | MASST Docs Uber — Cost Optimization Strategies: flowchart covering Network Optimization, Data Optimization, Compute Optimization, Spot Instances Batch Processing, Reserved Capacity Core… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141344/masst-docs/hld/uber/1-emerging-technologies-00000f.png Uber · 1. Emerging Technologies · HLD Case Study | MASST Docs Uber — Emerging Technologies: flowchart covering Technical Evolution, Platform Evolution, New Modalities, Autonomous Vehicles, Self-Driving Cars Uber ATG. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/url-shortener https://res.cloudinary.com/ddg380vsg/image/upload/v1782141352/masst-docs/hld/url-shortener/approach-3-pre-generated-keys-00002a.png URL Shortener · Approach 3: Pre-generated Keys · HLD Case Study | MASST Docs URL Shortener — Approach 3: Pre-generated Keys: flowchart covering Key Generator…, Key Database…, App Server…. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141358/masst-docs/hld/url-shortener/system-architecture-000017.png URL Shortener · System Architecture · HLD Case Study | MASST Docs URL Shortener — System Architecture: flowchart covering CDN, Load Balancer, App Server, Cache…, Database…. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/web-crawler https://res.cloudinary.com/ddg380vsg/image/upload/v1782141365/masst-docs/hld/web-crawler-system-design/high-level-architecture-000063.png Web Crawler System Design · High-Level Architecture · HLD Case Study | MASST Docs Web Crawler System Design — High-Level Architecture: flowchart covering Seed URLs, URL Frontier…, Crawler Worker 1, Crawler Worker N…, Content Processor. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141371/masst-docs/hld/web-crawler-system-design/priority-based-crawling-00000e.png Web Crawler System Design · Priority-Based Crawling · HLD Case Study | MASST Docs Web Crawler System Design — Priority-Based Crawling: flowchart covering URL Frontier, Priority Queues, Priority 0: Important sites…, Priority 1: High PageRank sites, Priority 2:… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141376/masst-docs/hld/web-crawler-system-design/back-queue-selector-000020.png Web Crawler System Design · Back Queue Selector · HLD Case Study | MASST Docs Web Crawler System Design — Back Queue Selector: flowchart covering URL Request, Back Queue Selector, Queue A…, Queue B…, Queue C…. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141386/masst-docs/hld/web-crawler-system-design/crawler-worker-design-00002e.png Web Crawler System Design · Crawler Worker Design · HLD Case Study | MASST Docs Web Crawler System Design — Crawler Worker Design: flowchart covering 1. Get URL from Frontier, 2. Check robots.txt…, Allowed?, Skip, mark URL, 3. Fetch Page…. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141391/masst-docs/hld/web-crawler-system-design/handling-javascript-rendered-content-00004e.png Web Crawler System Design · Handling JavaScript-Rendered Content · HLD Case Study | MASST Docs Web Crawler System Design — Handling JavaScript-Rendered Content: flowchart covering Static Fetch…, Content Processor, Dynamic Fetch…, Headless Browser Pool…. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/whatsapp https://res.cloudinary.com/ddg380vsg/image/upload/v1782141397/masst-docs/hld/whatsapp/high-level-architecture-00000d.png WhatsApp · High-Level Architecture · HLD Case Study | MASST Docs WhatsApp — High-Level Architecture: flowchart covering Data Layer, Core Services, Connection Layer, Edge Layer, Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141414/masst-docs/hld/whatsapp/1-connection-management-00004a.png WhatsApp · 1. Connection Management · HLD Case Study | MASST Docs WhatsApp — Connection Management: flowchart covering Reconnection, Connection Pool, Connection Server, Connection Types, TCP Connection Primary. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141427/masst-docs/hld/whatsapp/2-message-delivery-system-000075.png WhatsApp · 2. Message Delivery System · HLD Case Study | MASST Docs WhatsApp — Message Delivery System: flowchart covering Message Types, Offline Handling, Delivery States, Message Flow, Compose Message Client Side. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141436/masst-docs/hld/whatsapp/3-end-to-end-encryption-signal-protocol-000053.png WhatsApp · 3. End-to-End Encryption (Signal Protocol) · HLD Case Study | MASST Docs WhatsApp — End-to-End Encryption (Signal Protocol): flowchart covering Encryption Process, Double Ratchet, Key Exchange, Key Types, Identity Key Long-term Public Key. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141442/masst-docs/hld/whatsapp/4-group-messaging-000031.png WhatsApp · 4. Group Messaging · HLD Case Study | MASST Docs WhatsApp — Group Messaging: flowchart covering Group Message Flow, Group Encryption, Group Management, Group Types, Standard Group Up to 1024 Members. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141447/masst-docs/hld/whatsapp/5-voice-video-calling-000041.png WhatsApp · 5. Voice & Video Calling · HLD Case Study | MASST Docs WhatsApp — Voice & Video Calling: flowchart covering Infrastructure, Call Features, Media Transport, Call Setup, Initiate Call Caller Action. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141454/masst-docs/hld/whatsapp/6-status-stories-system-000047.png WhatsApp · 6. Status (Stories) System · HLD Case Study | MASST Docs WhatsApp — Status (Stories) System: flowchart covering Privacy, Viewing, Status Lifecycle, Status Types, Text Status Background + Text. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141463/masst-docs/hld/whatsapp/1-mnesia-erlang-database-000032.png WhatsApp · 1. Mnesia (Erlang Database) · HLD Case Study | MASST Docs WhatsApp — Mnesia (Erlang Database): flowchart covering Operations, Distribution, Replication, Tables, Mnesia Architecture. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141470/masst-docs/hld/whatsapp/2-cassandra-message-storage-00002d.png WhatsApp · 2. Cassandra (Message Storage) · HLD Case Study | MASST Docs WhatsApp — Cassandra (Message Storage): flowchart covering Consistency, Data Model, Keyspaces, Cassandra Cluster, Datacenter 1 US. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141480/masst-docs/hld/whatsapp/3-blob-storage-media-000059.png WhatsApp · 3. Blob Storage (Media) · HLD Case Study | MASST Docs WhatsApp — Blob Storage (Media): flowchart covering Delivery, Media Processing, Storage Tiers, Media Upload, Client Upload Encrypted Media. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141491/masst-docs/hld/whatsapp/1-erlang-otp-architecture-000022.png WhatsApp · 1. Erlang/OTP Architecture · HLD Case Study | MASST Docs WhatsApp — Erlang/OTP Architecture: flowchart covering Performance, Distribution, OTP Patterns, Erlang Benefits, Lightweight Processes 2KB per process. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141497/masst-docs/hld/whatsapp/2-global-infrastructure-000045.png WhatsApp · 2. Global Infrastructure · HLD Case Study | MASST Docs WhatsApp — Global Infrastructure: flowchart covering Global Services, Core Infrastructure, Edge Network, Regional Deployment, US Regions Multiple Datacenters. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141502/masst-docs/hld/whatsapp/3-performance-optimization-00000d.png WhatsApp · 3. Performance Optimization · HLD Case Study | MASST Docs WhatsApp — Performance Optimization: flowchart covering Targets, Server Optimization, Protocol Optimization, Client Optimization, Local SQLite Message Cache. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141514/masst-docs/hld/whatsapp/1-privacy-architecture-000027.png WhatsApp · 1. Privacy Architecture · HLD Case Study | MASST Docs WhatsApp — Privacy Architecture: flowchart covering Business Privacy, Blocking & Reporting, User Privacy Controls, Data Minimization, No Message Storage Delivered = Deleted. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141528/masst-docs/hld/whatsapp/2-security-measures-00005e.png WhatsApp · 2. Security Measures · HLD Case Study | MASST Docs WhatsApp — Security Measures: flowchart covering Verification, Anti-Abuse, Encryption, Authentication, Phone Number Auth SMS/Call Verification. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141538/masst-docs/hld/whatsapp/1-monitoring-stack-000068.png WhatsApp · 1. Monitoring Stack · HLD Case Study | MASST Docs WhatsApp — Monitoring Stack: flowchart covering Logging, Dashboards, Alerting, Metrics, Message Metrics Volume, Latency. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141543/masst-docs/hld/whatsapp/1-continuous-deployment-pipeline-000013.png WhatsApp · 1. Continuous Deployment Pipeline · HLD Case Study | MASST Docs WhatsApp — Continuous Deployment Pipeline: architecture diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141549/masst-docs/hld/whatsapp/1-continuous-deployment-pipeline-000014.png WhatsApp · 1. Continuous Deployment Pipeline · HLD Case Study | MASST Docs WhatsApp — Continuous Deployment Pipeline: flowchart covering Rollback Strategy, Deployment Pipeline, Development, Code Commit, Build & Test Erlang Dialyzer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141559/masst-docs/hld/whatsapp/3-chaos-engineering-00005d.png WhatsApp · 3. Chaos Engineering · HLD Case Study | MASST Docs WhatsApp — Chaos Engineering: flowchart covering Response, Monitoring, Target Systems, Chaos Scenarios, Node Kill Random Crashes. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141572/masst-docs/hld/whatsapp/1-data-pipeline-000046.png WhatsApp · 1. Data Pipeline · HLD Case Study | MASST Docs WhatsApp — Data Pipeline: flowchart covering Applications, ML Models, Processing, Data Sources, Delivery Metrics Anonymized. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141587/masst-docs/hld/whatsapp/1-infrastructure-cost-distribution-00002b.png WhatsApp · 1. Infrastructure Cost Distribution · HLD Case Study | MASST Docs WhatsApp — Infrastructure Cost Distribution: distribution chart covering Erlang Servers, Media, Mnesia, Cassandra. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141599/masst-docs/hld/whatsapp/2-cost-efficiency-strategies-000044.png WhatsApp · 2. Cost Efficiency Strategies · HLD Case Study | MASST Docs WhatsApp — Cost Efficiency Strategies: flowchart covering Operational Efficiency, Storage Efficiency, Network Efficiency, Compute Efficiency, Erlang Efficiency Millions of… Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141611/masst-docs/hld/whatsapp/1-emerging-technologies-00000e.png WhatsApp · 1. Emerging Technologies · HLD Case Study | MASST Docs WhatsApp — Emerging Technologies: flowchart covering Technical Evolution, Business Platform, Privacy Evolution, Multi-Device, Linked Devices Multi-device Sync. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/hld/youtube https://res.cloudinary.com/ddg380vsg/image/upload/v1782141624/masst-docs/hld/youtube/high-level-architecture-00001b.png YouTube · High-Level Architecture · HLD Case Study | MASST Docs YouTube — High-Level Architecture: flowchart covering Data Layer, Core Services, API Gateway, Edge Layer, Client Layer. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141637/masst-docs/hld/youtube/1-video-upload-pipeline-00002e.png YouTube · 1. Video Upload Pipeline · HLD Case Study | MASST Docs YouTube — Video Upload Pipeline: flowchart covering Storage & Distribution, Content Analysis, Processing Pipeline, Upload Ingestion, User Upload Chunked Upload API. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141647/masst-docs/hld/youtube/2-video-playback-service-00005f.png YouTube · 2. Video Playback Service · HLD Case Study | MASST Docs YouTube — Video Playback Service: sequence diagram covering video_id, DASH/HLS, ABR. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141657/masst-docs/hld/youtube/3-search-and-discovery-000029.png YouTube · 3. Search and Discovery · HLD Case Study | MASST Docs YouTube — Search and Discovery: flowchart covering Results, Personalization, Search Infrastructure, Query Processing, Search Query. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141670/masst-docs/hld/youtube/4-recommendation-engine-000026.png YouTube · 4. Recommendation Engine · HLD Case Study | MASST Docs YouTube — Recommendation Engine: flowchart covering Serving, ML Models, Feature Engineering, Data Collection, Watch Events Duration, Completion. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141677/masst-docs/hld/youtube/bigtable-primary-nosql-000011.png YouTube · Bigtable (Primary NoSQL) · HLD Case Study | MASST Docs YouTube — Bigtable (Primary NoSQL): flowchart covering Applications, Column Families, Tablet Servers, Bigtable Architecture, Tablet Server 1 Watch History. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141696/masst-docs/hld/youtube/cloud-spanner-global-transactions-000059.png YouTube · Cloud Spanner (Global Transactions) · HLD Case Study | MASST Docs YouTube — Cloud Spanner (Global Transactions): flowchart covering Services, Data Tables, Multi-Region Deployment, Spanner Architecture, US Region Primary. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141708/masst-docs/hld/youtube/colossus-distributed-file-system-000017.png YouTube · Colossus (Distributed File System) · HLD Case Study | MASST Docs YouTube — Colossus (Distributed File System): flowchart covering Access Patterns, Data Types, Storage Tiers, Colossus Architecture, Hot Storage Trending Videos. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141714/masst-docs/hld/youtube/stream-processing-architecture-000035.png YouTube · Stream Processing Architecture · HLD Case Study | MASST Docs YouTube — Stream Processing Architecture: flowchart covering Real-time Features, Analytics, Stream Processing, Message Queue, Event Sources. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141725/masst-docs/hld/youtube/1-global-load-balancing-000054.png YouTube · 1. Global Load Balancing · HLD Case Study | MASST Docs YouTube — Global Load Balancing: flowchart covering Service Mesh, Backend Selection, Edge Layer, DNS Layer, Global DNS Anycast Routing. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141734/masst-docs/hld/youtube/2-caching-strategy-000046.png YouTube · 2. Caching Strategy · HLD Case Study | MASST Docs YouTube — Caching Strategy: flowchart covering Database Layer, Application Layer, CDN Layer, Client Side, Browser Cache Service Worker. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141742/masst-docs/hld/youtube/3-video-segment-caching-000008.png YouTube · 3. Video Segment Caching · HLD Case Study | MASST Docs YouTube — Video Segment Caching: flowchart covering Predictive Caching, Cache Distribution, Content Popularity, Viral Content Top 1%, Popular Content Top 10%. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141754/masst-docs/hld/youtube/security-architecture-000019.png YouTube · Security Architecture · HLD Case Study | MASST Docs YouTube — Security Architecture: flowchart covering Content Safety, Infrastructure Security, Platform Security, Content Security, Widevine DRM Content Protection. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141764/masst-docs/hld/youtube/monitoring-and-observability-000051.png YouTube · Monitoring and Observability · HLD Case Study | MASST Docs YouTube — Monitoring and Observability: flowchart covering Response, Visualization, Processing, Data Collection, Prometheus Metrics Service Health. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141769/masst-docs/hld/youtube/continuous-integration-continuous-deployment-000067.png YouTube · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs YouTube — Continuous Integration/Continuous Deployment: architecture diagram. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141774/masst-docs/hld/youtube/continuous-integration-continuous-deployment-000078.png YouTube · Continuous Integration/Continuous Deployment · HLD Case Study | MASST Docs YouTube — Continuous Integration/Continuous Deployment: flowchart covering Rollback, Release Pipeline, Development, Code Commit, Blaze Build. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141786/masst-docs/hld/youtube/chaos-engineering-000024.png YouTube · Chaos Engineering · HLD Case Study | MASST Docs YouTube — Chaos Engineering: flowchart covering Recovery, Monitoring, Target Systems, Chaos Tools, DiRT Exercises Disaster Recovery Testing. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141796/masst-docs/hld/youtube/data-pipeline-000028.png YouTube · Data Pipeline · HLD Case Study | MASST Docs YouTube — Data Pipeline: flowchart covering ML Applications, Feature Store, Batch Processing, Real-time Processing, Event Generation. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141801/masst-docs/hld/youtube/cost-optimization-00003d.png YouTube · Cost Optimization · HLD Case Study | MASST Docs YouTube — Cost Optimization: distribution chart covering Transcoding. Part of the HLD Case Study series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141811/masst-docs/hld/youtube/cost-optimization-00006d.png YouTube · Cost Optimization · HLD Case Study | MASST Docs YouTube — Cost Optimization: flowchart covering Monitoring, Network Optimization, Compute Optimization, Storage Optimization, Tiered Storage Hot/Warm/Cold. Part of the HLD Case Study series on MASST Docs. https://docs.masst.dev/sd/communication/grpc https://res.cloudinary.com/ddg380vsg/image/upload/v1782141815/masst-docs/sd/grpc/unary-rpc-000057.png gRPC · Unary RPC · System Design | MASST Docs gRPC — Unary RPC: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141821/masst-docs/sd/grpc/server-streaming-000018.png gRPC · Server Streaming · System Design | MASST Docs gRPC — Server Streaming: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141827/masst-docs/sd/grpc/client-streaming-000043.png gRPC · Client Streaming · System Design | MASST Docs gRPC — Client Streaming: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141833/masst-docs/sd/grpc/bidirectional-streaming-000062.png gRPC · Bidirectional Streaming · System Design | MASST Docs gRPC — Bidirectional Streaming: sequence diagram. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/communication/http https://res.cloudinary.com/ddg380vsg/image/upload/v1782141837/masst-docs/sd/http/connection-pooling-000070.png HTTP · Connection Pooling · System Design | MASST Docs HTTP — Connection Pooling: flowchart covering Client, Connection Pooln…, Server. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/communication/sse https://res.cloudinary.com/ddg380vsg/image/upload/v1782141843/masst-docs/sd/server-sent-events/how-sse-works-000032.png Server-Sent Events · How SSE Works · System Design | MASST Docs Server-Sent Events — How SSE Works: sequence diagram. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/communication/webhooks https://res.cloudinary.com/ddg380vsg/image/upload/v1782141849/masst-docs/sd/webhooks/polling-vs-webhooks-000024.png Webhooks · Polling vs Webhooks · System Design | MASST Docs Webhooks — Polling vs Webhooks: flowchart covering Webhooks, Polling, Client, Server, Client URL. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141854/masst-docs/sd/webhooks/how-webhooks-work-00001e.png Webhooks · How Webhooks Work · System Design | MASST Docs Webhooks — How Webhooks Work: sequence diagram covering e.g., Stripe, payment.completed, event payload. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141858/masst-docs/sd/webhooks/signature-verification-00002e.png Webhooks · Signature Verification · System Design | MASST Docs Webhooks — Signature Verification: flowchart covering Server, Your Webhook Endpoint, Verify: HMAC…, Process event, Reject…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141869/masst-docs/sd/webhooks/handling-on-your-end-000069.png Webhooks · Handling on Your End · System Design | MASST Docs Webhooks — Handling on Your End: flowchart covering Receive webhook, Verify signature, Return 200 immediately, Queue for async processing, Process event. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141874/masst-docs/sd/webhooks/as-a-provider-00001d.png Webhooks · As a Provider · System Design | MASST Docs Webhooks — As a Provider: flowchart covering Event occurs, Fan out to subscribers, Queue…, Worker: POST to subscriber URL, Mark delivered. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/communication/websockets https://res.cloudinary.com/ddg380vsg/image/upload/v1782141879/masst-docs/sd/websockets/websocket-handshake-00005e.png WebSockets · WebSocket Handshake · System Design | MASST Docs WebSockets — WebSocket Handshake: sequence diagram covering Upgrade: websocket. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141889/masst-docs/sd/websockets/connection-lifecycle-00005e.png WebSockets · Connection Lifecycle · System Design | MASST Docs WebSockets — Connection Lifecycle: state machine. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141893/masst-docs/sd/websockets/solutions-000013.png WebSockets · Solutions · System Design | MASST Docs WebSockets — Solutions: flowchart covering Server A…, Redis Pub/Sub, Server B…. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/design-patterns/bulkhead https://res.cloudinary.com/ddg380vsg/image/upload/v1782141900/masst-docs/sd/bulkhead/the-problem-000028.png Bulkhead · The Problem · System Design | MASST Docs Bulkhead — Problem: flowchart covering Shared Pool (100 threads), Service A calls…, Service B calls…, Service C calls…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141905/masst-docs/sd/bulkhead/the-solution-00006f.png Bulkhead · The Solution · System Design | MASST Docs Bulkhead — Solution: flowchart covering Pool A…, Service A, Pool B…, Service B…, Pool C…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141910/masst-docs/sd/bulkhead/architecture-example-000013.png Bulkhead · Architecture Example · System Design | MASST Docs Bulkhead — Architecture Example: flowchart covering Application, Payment Bulkhead…, Inventory Bulkhead…, Shipping Bulkhead…, Payment API. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/design-patterns/circuit-breaker https://res.cloudinary.com/ddg380vsg/image/upload/v1782141918/masst-docs/sd/circuit-breaker/the-problem-000001.png Circuit Breaker · The Problem · System Design | MASST Docs Circuit Breaker — Problem: flowchart covering Service A, Service B…, Threads blockednResources exhaustednService A unavailable. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141927/masst-docs/sd/circuit-breaker/circuit-breaker-states-000036.png Circuit Breaker · Circuit Breaker States · System Design | MASST Docs Circuit Breaker — Circuit Breaker States: state machine. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141936/masst-docs/sd/circuit-breaker/how-it-works-000038.png Circuit Breaker · How It Works · System Design | MASST Docs Circuit Breaker — How It Works: sequence diagram. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/design-patterns/cqrs https://res.cloudinary.com/ddg380vsg/image/upload/v1782141941/masst-docs/sd/cqrs/traditional-vs-cqrs-000068.png CQRS · Traditional vs CQRS · System Design | MASST Docs CQRS — Traditional vs CQRS: flowchart covering CQRS, Traditional, Client, Service…, Database…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141947/masst-docs/sd/cqrs/simple-cqrs-00001d.png CQRS · Simple CQRS · System Design | MASST Docs CQRS — Simple CQRS: flowchart covering Write, Normalized Tables, Read, Views / Materialized Views. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141955/masst-docs/sd/cqrs/separate-databases-00003b.png CQRS · Separate Databases · System Design | MASST Docs CQRS — Separate Databases: flowchart covering Write, PostgreSQL…, Read Model Sync, Elasticsearch…, Read. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/design-patterns/event-sourcing https://res.cloudinary.com/ddg380vsg/image/upload/v1782141961/masst-docs/sd/event-sourcing/traditional-vs-event-sourcing-000041.png Event Sourcing · Traditional vs Event Sourcing · System Design | MASST Docs Event Sourcing — Traditional vs Event Sourcing: flowchart covering Event Sourcing, Traditional (State-based), Account 123nBalance: $500nLastUpdated: 2024-01-15, AccountCreated…,… Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141973/masst-docs/sd/event-sourcing/how-it-works-00006b.png Event Sourcing · How It Works · System Design | MASST Docs Event Sourcing — How It Works: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141981/masst-docs/sd/event-sourcing/snapshots-000057.png Event Sourcing · Snapshots · System Design | MASST Docs Event Sourcing — Snapshots: flowchart covering Events: 1, 2, ... 10, Snapshot at event 10, Rebuild: Snapshot + events 11, 12, .... Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782141987/masst-docs/sd/event-sourcing/event-sourcing-cqrs-00003f.png Event Sourcing · Event Sourcing + CQRS · System Design | MASST Docs Event Sourcing — Event Sourcing + CQRS: flowchart covering Command, Event Store, Events, Projections, Query. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/design-patterns/idempotency https://res.cloudinary.com/ddg380vsg/image/upload/v1782142003/masst-docs/sd/idempotency/why-idempotency-matters-000002.png Idempotency · Why Idempotency Matters · System Design | MASST Docs Idempotency — Why Idempotency Matters: sequence diagram covering charge $100, key: abc-123. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142013/masst-docs/sd/idempotency/how-it-works-000013.png Idempotency · How It Works · System Design | MASST Docs Idempotency — How It Works: flowchart covering Request with Idempotency-Key, Check key in store, Return cached response, Process request, Save result with key. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142018/masst-docs/sd/idempotency/message-processing-000033.png Idempotency · Message Processing · System Design | MASST Docs Idempotency — Message Processing: flowchart covering Queue, Worker, Check: processed?, ACK message, Process. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142024/masst-docs/sd/idempotency/at-least-once-idempotency-000019.png Idempotency · At-Least-Once + Idempotency · System Design | MASST Docs Idempotency — At-Least-Once + Idempotency: flowchart covering Producer, Queue, Consumer, DB…, Skip. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/design-patterns/retry https://res.cloudinary.com/ddg380vsg/image/upload/v1782142029/masst-docs/sd/retry-pattern/immediate-retry-00003c.png Retry Pattern · Immediate Retry · System Design | MASST Docs Retry Pattern — Immediate Retry: flowchart covering Request, Retry 1, Retry 2, Retry 3, Fail. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142035/masst-docs/sd/retry-pattern/the-thundering-herd-problem-000078.png Retry Pattern · The Thundering Herd Problem · System Design | MASST Docs Retry Pattern — Thundering Herd Problem: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142040/masst-docs/sd/retry-pattern/retry-circuit-breaker-000001.png Retry Pattern · Retry + Circuit Breaker · System Design | MASST Docs Retry Pattern — Retry + Circuit Breaker: flowchart covering Request, Circuit Breaker, Service, Retry Logic, OPEN: Fail Fast. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/design-patterns/saga https://res.cloudinary.com/ddg380vsg/image/upload/v1782142045/masst-docs/sd/saga-pattern/the-problem-000064.png Saga Pattern · The Problem · System Design | MASST Docs Saga Pattern — Problem: flowchart covering Order Service, Payment Service, Inventory Service, Can't use 2PC easilynNeed to rollback!. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142055/masst-docs/sd/saga-pattern/how-sagas-work-000010.png Saga Pattern · How Sagas Work · System Design | MASST Docs Saga Pattern — How Sagas Work: flowchart covering Failure at T3, Happy Path, Success!, T3…, C1…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142060/masst-docs/sd/saga-pattern/choreography-000056.png Saga Pattern · Choreography · System Design | MASST Docs Saga Pattern — Choreography: flowchart covering OrdernService, PaymentnService, InventorynService. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142073/masst-docs/sd/saga-pattern/orchestration-00000f.png Saga Pattern · Orchestration · System Design | MASST Docs Saga Pattern — Orchestration: flowchart covering Orchestrator, Order Service, Payment Service, Inventory Service. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142093/masst-docs/sd/saga-pattern/example-order-saga-00003f.png Saga Pattern · Example: Order Saga · System Design | MASST Docs Saga Pattern — Example: Order Saga: flowchart covering 1. Create Order…, 2. Reserve InventorynCompensation: Release Inventory, 3. Process PaymentnCompensation: Refund Payment, 4.… Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142105/masst-docs/sd/saga-pattern/failure-scenario-000055.png Saga Pattern · Failure Scenario · System Design | MASST Docs Saga Pattern — Failure Scenario: flowchart covering 1. Create Order ✓, 2. Reserve Inventory ✓, 3. Process Payment ✗, Release Inventory, Cancel Order. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/design-patterns/strangler-fig https://res.cloudinary.com/ddg380vsg/image/upload/v1782142115/masst-docs/sd/strangler-fig/the-pattern-000049.png Strangler Fig · The Pattern · System Design | MASST Docs Strangler Fig — Pattern: flowchart covering Proxy, Legacy. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142120/masst-docs/sd/strangler-fig/the-pattern-000065.png Strangler Fig · The Pattern · System Design | MASST Docs Strangler Fig — Pattern: flowchart covering Proxy, Legacy, New. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142131/masst-docs/sd/strangler-fig/the-pattern-000016.png Strangler Fig · The Pattern · System Design | MASST Docs Strangler Fig — Pattern: flowchart covering Proxy, New, Legacy…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142137/masst-docs/sd/strangler-fig/data-migration-000005.png Strangler Fig · Data Migration · System Design | MASST Docs Strangler Fig — Data Migration: flowchart covering Legacy, New. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142143/masst-docs/sd/strangler-fig/data-migration-000020.png Strangler Fig · Data Migration · System Design | MASST Docs Strangler Fig — Data Migration: flowchart covering Legacy, New. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142149/masst-docs/sd/strangler-fig/data-migration-00002a.png Strangler Fig · Data Migration · System Design | MASST Docs Strangler Fig — Data Migration: flowchart covering Legacy, New. Part of the System Design series on MASST Docs. https://docs.masst.dev/dsa https://res.cloudinary.com/ddg380vsg/image/upload/v1782142156/masst-docs/dsa/dsa-patterns/how-to-learn-dsa-in-10-weeks-00002f.png DSA Patterns · How to learn DSA in 10 weeks · DSA Pattern | MASST Docs DSA Patterns — How to learn DSA in 10 weeks: flowchart covering Tier 5 — Dynamic programming (weeks 7-10), Tier 4 — Recursion & search (weeks 6-7), Tier 3 — Graphs (weeks 5-6), Tier… Part of the DSA Pattern series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142167/masst-docs/dsa/dsa-patterns/pattern-recognition-cheat-sheet-00003c.png DSA Patterns · Pattern recognition cheat sheet · DSA Pattern | MASST Docs DSA Patterns — Pattern recognition cheat sheet: flowchart covering What's the input?, Looking for what?, Two Pointers, Binary Search, Prefix Sums. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/arrays-strings/binary-search https://res.cloudinary.com/ddg380vsg/image/upload/v1782142180/masst-docs/dsa/binary-search/the-core-insight-00005d.png Binary Search · The core insight · DSA Pattern | MASST Docs Binary Search — Core insight: state machine. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/arrays-strings/hashing https://res.cloudinary.com/ddg380vsg/image/upload/v1782142185/masst-docs/dsa/hashing/visual-walkthrough-000043.png Hashing · Visual walkthrough · DSA Pattern | MASST Docs Hashing — Visual walkthrough: flowchart covering Start: seen = empty, i=0, x=2: need 9-2=7 in seen? No. seen = 123;2 → 0125;, i=1, x=7: need 9-7=2 in seen? Yes at 0! Return 91;0, 193;. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/arrays-strings/intervals-greedy https://res.cloudinary.com/ddg380vsg/image/upload/v1782142195/masst-docs/dsa/intervals-greedy/flavor-2-exchange-argument-greedy-000002.png Intervals & Greedy · Flavor 2 — Exchange-argument greedy · DSA Pattern | MASST Docs Intervals & Greedy — Flavor 2 — Exchange-argument greedy: state machine. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/arrays-strings/prefix-sum https://res.cloudinary.com/ddg380vsg/image/upload/v1782142200/masst-docs/dsa/prefix-sums-difference-arrays/visual-walkthrough-prefix-sums-00002e.png Prefix Sums & Difference Arrays · Visual walkthrough — prefix sums · DSA Pattern | MASST Docs Prefix Sums & Difference Arrays — Visual walkthrough — prefix sums: flowchart covering Prefix sum (one extra slot at front), Original array. Part of the DSA Pattern series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142206/masst-docs/dsa/prefix-sums-difference-arrays/visual-walkthrough-difference-array-00002a.png Prefix Sums & Difference Arrays · Visual walkthrough — difference array · DSA Pattern | MASST Docs Prefix Sums & Difference Arrays — Visual walkthrough — difference array: flowchart covering Take prefix sum, Difference array — after 3 range-add ops: 91;1,2,1093;, 91;2,3,2093;, 91… Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/arrays-strings/sliding-window https://res.cloudinary.com/ddg380vsg/image/upload/v1782142211/masst-docs/dsa/sliding-window/the-core-insight-000065.png Sliding Window · The core insight · DSA Pattern | MASST Docs Sliding Window — Core insight: state machine. Part of the DSA Pattern series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142217/masst-docs/dsa/sliding-window/visual-walkthrough-00007b.png Sliding Window · Visual walkthrough · DSA Pattern | MASST Docs Sliding Window — Visual walkthrough: flowchart covering Step 5: extend → 3 distinct → shrink left once, Step 4: extend → 3 distinct → shrink left twice, Step 3: window valid, length=3. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/arrays-strings/two-pointers https://res.cloudinary.com/ddg380vsg/image/upload/v1782142223/masst-docs/dsa/two-pointers/the-core-insight-000063.png Two Pointers · The core insight · DSA Pattern | MASST Docs Two Pointers — Core insight: state machine covering or condition needs growth, or condition needs shrink. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/bit/bit-manipulation https://res.cloudinary.com/ddg380vsg/image/upload/v1782142228/masst-docs/dsa/bit-manipulation/the-four-tools-mental-model-000029.png Bit Manipulation · The four-tools mental model · DSA Pattern | MASST Docs Bit Manipulation — Four-tools mental model: flowchart covering Problem with integers, Pairs of duplicates with one or two singles?, XOR pairing trick, Count set bits / iterate set… Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/dp/bitmask https://res.cloudinary.com/ddg380vsg/image/upload/v1782142233/masst-docs/dsa/dp-bitmask/iterate-all-subsets-of-mask-smaller-first-by-numer-00003f.png DP — Bitmask · Iterate all subsets of mask (smaller-first by numeric value, decreasing) · DSA Pattern | MASST Docs DP — Bitmask — Iterate all subsets of mask (smaller-first by numeric value, decreasing): flowchart covering Subset-based problem, n ≤ 20?, What's the state?, NOT bitmask — try other… Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/dp/grid-2d https://res.cloudinary.com/ddg380vsg/image/upload/v1782142238/masst-docs/dsa/dp-2d-grid-two-sequence/two-flavors-000014.png DP — 2D Grid / Two-Sequence · Two flavors · DSA Pattern | MASST Docs DP — 2D Grid / Two-Sequence — Two flavors: flowchart covering 2D DP, Grid DP, Two-Sequence DP, Count paths, Min cost path. Part of the DSA Pattern series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142243/masst-docs/dsa/dp-2d-grid-two-sequence/visual-walkthrough-unique-paths-on-3-3-00006f.png DP — 2D Grid / Two-Sequence · Visual walkthrough — Unique Paths on 3×3 · DSA Pattern | MASST Docs DP — 2D Grid / Two-Sequence — Visual walkthrough — Unique Paths on 3×3: flowchart covering 1,1, 2,2, 1,2, 2,1, 3,3. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/dp https://res.cloudinary.com/ddg380vsg/image/upload/v1782142249/masst-docs/dsa/dynamic-programming/how-to-think-about-a-dp-problem-000025.png Dynamic Programming · How to think about a DP problem · DSA Pattern | MASST Docs Dynamic Programming — How to think about a DP problem: flowchart covering See a problem, Optimal substructure?, Not DP — try greedy or brute force, Overlapping subproblems?, Probably… Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/dp/intervals https://res.cloudinary.com/ddg380vsg/image/upload/v1782142254/masst-docs/dsa/dp-intervals-partition-mcm/the-what-happens-last-perspective-000072.png DP — Intervals / Partition / MCM · The "what happens last" perspective · DSA Pattern | MASST Docs DP — Intervals / Partition / MCM — "what happens last" perspective: flowchart covering Problem on a sequence, State is an interval?, Interval DP try every split k, Burst… Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/dp/knapsack https://res.cloudinary.com/ddg380vsg/image/upload/v1782142262/masst-docs/dsa/dp-knapsack-family/why-iteration-order-matters-000064.png DP — Knapsack Family · Why iteration order matters · DSA Pattern | MASST Docs DP — Knapsack Family — Why iteration order matters: flowchart covering Knapsack-flavored problem, Each item used at most once?, 0/1 Knapsack iterate capacity BACKWARD, Unbounded… Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/dp/linear https://res.cloudinary.com/ddg380vsg/image/upload/v1782142268/masst-docs/dsa/dp-linear-1d/the-core-insight-00000a.png DP — Linear / 1D · The core insight · DSA Pattern | MASST Docs DP — Linear / 1D — Core insight: flowchart covering Sequence problem, State is single index?, Depends on O…, Fibonacci-like House Robber, Climb Stairs, LIS-like scan back to find best. Part of the DSA Pattern series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142273/masst-docs/dsa/dp-linear-1d/visual-walkthrough-climbing-stairs-000035.png DP — Linear / 1D · Visual walkthrough — Climbing Stairs · DSA Pattern | MASST Docs DP — Linear / 1D — Visual walkthrough — Climbing Stairs: flowchart covering dp 1 =1, dp 3 =3, dp 2 =2, dp 4 =5, dp 5 =8. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/dp/tree-dp https://res.cloudinary.com/ddg380vsg/image/upload/v1782142279/masst-docs/dsa/dp-tree-dp/the-return-one-thing-record-another-pattern-000026.png DP — Tree DP · The "return one thing, record another" pattern · DSA Pattern | MASST Docs DP — Tree DP — "return one thing, record another" pattern: flowchart covering Tree problem, Just one value per subtree?, Simple post-order height, sum, count, Return tuple rob/skip,… Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/graphs/dfs-bfs https://res.cloudinary.com/ddg380vsg/image/upload/v1782142285/masst-docs/dsa/dfs-bfs-islands/bfs-breadth-first-00001a.png DFS / BFS / Islands · BFS — Breadth-first · DSA Pattern | MASST Docs DFS / BFS / Islands — BFS — Breadth-first: flowchart covering Graph traversal needed, Shortest path in unweighted graph?, BFS, Level-by-level spreading?, Connectivity / cycle / flood… Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/graphs/shortest-paths https://res.cloudinary.com/ddg380vsg/image/upload/v1782142291/masst-docs/dsa/shortest-paths/the-core-insight-000055.png Shortest Paths · The core insight · DSA Pattern | MASST Docs Shortest Paths — Core insight: flowchart covering Need shortest path, Weights?, BFS O V+E, 0-1 BFS deque-based O V+E, Dijkstra O V+E log V. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/graphs/topological-sort https://res.cloudinary.com/ddg380vsg/image/upload/v1782069773/masst-docs/dsa/topological-sort/why-both-work-00005e.png Topological Sort · Why both work · DSA Pattern | MASST Docs Topological Sort — Why both work: flowchart. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/graphs/union-find https://res.cloudinary.com/ddg380vsg/image/upload/v1782142303/masst-docs/dsa/union-find-disjoint-set-union/the-core-insight-000025.png Union-Find (Disjoint Set Union) · The core insight · DSA Pattern | MASST Docs Union-Find (Disjoint Set Union) — Core insight: flowchart covering After find(d) with path compression, Before path compression. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/heaps/heap https://res.cloudinary.com/ddg380vsg/image/upload/v1782142308/masst-docs/dsa/heap-top-k-two-heaps-k-way-merge/the-core-insight-000037.png Heap / Top-K / Two Heaps / K-way Merge · The core insight · DSA Pattern | MASST Docs Heap / Top-K / Two Heaps / K-way Merge — Core insight: flowchart covering Heap problem?, Two heaps: max-heap lower + min-heap upper, Heap of K pointers, pop smallest, push from same… Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/linked-list/linked-list https://res.cloudinary.com/ddg380vsg/image/upload/v1782142313/masst-docs/dsa/linked-list-manipulation/technique-dummy-head-node-00003d.png Linked List Manipulation · Technique: dummy head node · DSA Pattern | MASST Docs Linked List Manipulation — Technique: dummy head node: state machine. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/recursion/backtracking https://res.cloudinary.com/ddg380vsg/image/upload/v1782142318/masst-docs/dsa/backtracking/the-core-insight-000045.png Backtracking · The core insight · DSA Pattern | MASST Docs Backtracking — Core insight: flowchart covering Decision tree build a partial solution, At each step: make a choice, Recurse with extended path, Prune this branch, Goal reached?. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/recursion/cyclic-sort https://res.cloudinary.com/ddg380vsg/image/upload/v1782142326/masst-docs/dsa/cyclic-sort/the-core-insight-00002c.png Cyclic Sort · The core insight · DSA Pattern | MASST Docs Cyclic Sort — Core insight: flowchart covering Array index i, Is nums i at its correct slot?, i++, Swap nums i with nums of target, i >= n? done. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/stacks-queues/monotonic-stack https://res.cloudinary.com/ddg380vsg/image/upload/v1782142334/masst-docs/dsa/monotonic-stack-deque/the-core-insight-00000d.png Monotonic Stack / Deque · The core insight · DSA Pattern | MASST Docs Monotonic Stack / Deque — Core insight: state machine covering violates invariant. Part of the DSA Pattern series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142344/masst-docs/dsa/monotonic-stack-deque/visual-walkthrough-000065.png Monotonic Stack / Deque · Visual walkthrough · DSA Pattern | MASST Docs Monotonic Stack / Deque — Visual walkthrough: flowchart covering Stack state at i=4 (decreasing order top↑), idx 2, 71 idx 3. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/trees/bst https://res.cloudinary.com/ddg380vsg/image/upload/v1782142349/masst-docs/dsa/bst-properties/the-core-insight-000039.png BST Properties · The core insight · DSA Pattern | MASST Docs BST Properties — Core insight: flowchart covering BST problem, Need a single value?, Recurse one child per node O h, Need kth smallest / median / sorted?, In-order traversal… Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/trees/traversals https://res.cloudinary.com/ddg380vsg/image/upload/v1782142354/masst-docs/dsa/binary-tree-traversals/in-order-bst-s-secret-weapon-00000f.png Binary Tree Traversals · In-order — BST's secret weapon · DSA Pattern | MASST Docs Binary Tree Traversals — In-order — BST's secret weapon: flowchart covering Root: choose traversal, Depends on child answers?, Post-order DFS recurse first, combine after, Need to… Part of the DSA Pattern series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142360/masst-docs/dsa/binary-tree-traversals/visual-walkthrough-000029.png Binary Tree Traversals · Visual walkthrough · DSA Pattern | MASST Docs Binary Tree Traversals — Visual walkthrough: flowchart. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/dsa/patterns/trees/trie https://res.cloudinary.com/ddg380vsg/image/upload/v1782142365/masst-docs/dsa/trie-prefix-tree/the-core-insight-000002.png Trie (Prefix Tree) · The core insight · DSA Pattern | MASST Docs Trie (Prefix Tree) — Core insight: flowchart. Part of the DSA Pattern series on MASST Docs. https://docs.masst.dev/sd/fundamentals/cap-theorem https://res.cloudinary.com/ddg380vsg/image/upload/v1782142370/masst-docs/sd/cap-theorem/diagram-cap-pacelc-000043.png CAP Theorem · Diagram: CAP & PACELC · System Design | MASST Docs CAP Theorem — Diagram: CAP & PACELC: flowchart covering CAP Theorem, Consistency, Availability, Partition Tolerance, CP Systems. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/fundamentals/consistency https://res.cloudinary.com/ddg380vsg/image/upload/v1782142375/masst-docs/sd/consistency/consistency-spectrum-00000c.png Consistency · Consistency Spectrum · System Design | MASST Docs Consistency — Consistency Spectrum: flowchart covering Linearizable, Sequential, Causal, Eventual, Weak. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/fundamentals/distributed-consensus https://res.cloudinary.com/ddg380vsg/image/upload/v1782142381/masst-docs/sd/distributed-consensus/why-consensus-is-hard-000056.png Distributed Consensus · Why Consensus is Hard · System Design | MASST Docs Distributed Consensus — Why Consensus is Hard: flowchart covering Leader proposes value, Node 1: YES ✓, Node 2: YES ✓, Node 3: crashed ✗, Node 4: partitioned ✗. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142386/masst-docs/sd/distributed-consensus/leader-election-00001c.png Distributed Consensus · Leader Election · System Design | MASST Docs Distributed Consensus — Leader Election: state machine. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142391/masst-docs/sd/distributed-consensus/normal-operation-00006f.png Distributed Consensus · Normal Operation · System Design | MASST Docs Distributed Consensus — Normal Operation: sequence diagram covering log entry. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142396/masst-docs/sd/distributed-consensus/two-phases-000014.png Distributed Consensus · Two Phases · System Design | MASST Docs Distributed Consensus — Two Phases: sequence diagram covering n, value. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/fundamentals/eventual-consistency https://res.cloudinary.com/ddg380vsg/image/upload/v1782142401/masst-docs/sd/eventual-consistency/how-it-works-00005d.png Eventual Consistency · How It Works · System Design | MASST Docs Eventual Consistency — How It Works: sequence diagram covering still stale. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/fundamentals/failover https://res.cloudinary.com/ddg380vsg/image/upload/v1782142407/masst-docs/sd/fail-over/active-passive-cold-warm-standby-00004c.png Fail-Over · Active-Passive (Cold/Warm Standby) · System Design | MASST Docs Fail-Over — Active-Passive (Cold/Warm Standby): flowchart covering After Failover, Normal Operation, Clients, Primary…, Standby…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142414/masst-docs/sd/fail-over/active-active-hot-hot-000047.png Fail-Over · Active-Active (Hot-Hot) · System Design | MASST Docs Fail-Over — Active-Active (Hot-Hot): flowchart covering Clients, Load Balancer, Server A…, Server B…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142423/masst-docs/sd/fail-over/health-checks-000003.png Fail-Over · Health Checks · System Design | MASST Docs Fail-Over — Health Checks: flowchart covering Health Checker, HTTP GET /health → 200 OK, TCP Connect → Success, Custom script → Exit 0. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142430/masst-docs/sd/fail-over/heartbeats-000046.png Fail-Over · Heartbeats · System Design | MASST Docs Fail-Over — Heartbeats: sequence diagram covering every 1s. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142444/masst-docs/sd/fail-over/split-brain-000077.png Fail-Over · Split-Brain · System Design | MASST Docs Fail-Over — Split-Brain: flowchart covering Node A: I'm primary, Node B: I'm primary, Both accept writes — data divergence. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142450/masst-docs/sd/fail-over/data-loss-000040.png Fail-Over · Data Loss · System Design | MASST Docs Fail-Over — Data Loss: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142455/masst-docs/sd/fail-over/database-failover-000046.png Fail-Over · Database Failover · System Design | MASST Docs Fail-Over — Database Failover: flowchart covering Primary…, Replica 1…, Replica 2…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142460/masst-docs/sd/fail-over/load-balancer-failover-000064.png Fail-Over · Load Balancer Failover · System Design | MASST Docs Fail-Over — Load Balancer Failover: flowchart covering Virtual IP, LB1…, LB2…, Servers. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142465/masst-docs/sd/fail-over/application-failover-000049.png Fail-Over · Application Failover · System Design | MASST Docs Fail-Over — Application Failover: flowchart covering Client, Server A, Server B. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/fundamentals/gossip-protocol https://res.cloudinary.com/ddg380vsg/image/upload/v1782142470/masst-docs/sd/gossip-protocol/how-it-works-000030.png Gossip Protocol · How It Works · System Design | MASST Docs Gossip Protocol — How It Works: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142475/masst-docs/sd/gossip-protocol/dissemination-styles-000070.png Gossip Protocol · Dissemination Styles · System Design | MASST Docs Gossip Protocol — Dissemination Styles: flowchart covering Push-Pull, Pull, Push, Node A, Node B. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142482/masst-docs/sd/gossip-protocol/failure-detection-000066.png Gossip Protocol · Failure Detection · System Design | MASST Docs Gossip Protocol — Failure Detection: flowchart covering Node A, Node C, Node D, Consensus: B is dead. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/fundamentals/micro-frontends https://res.cloudinary.com/ddg380vsg/image/upload/v1782142487/masst-docs/sd/micro-frontends-architecture/monolith-vs-micro-frontend-00000e.png Micro-frontends Architecture · Monolith vs Micro Frontend · System Design | MASST Docs Micro-frontends Architecture — Monolith vs Micro Frontend: flowchart covering Single React/Angular App, Catalog Module, Cart Module, Profile Module, Checkout Module. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142493/masst-docs/sd/micro-frontends-architecture/integration-approaches-000043.png Micro-frontends Architecture · Integration Approaches · System Design | MASST Docs Micro-frontends Architecture — Integration Approaches: flowchart covering MFE Package, Host App Build, Server, Composed HTML, Shell App. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142498/masst-docs/sd/micro-frontends-architecture/3-client-side-integration-00005a.png Micro-frontends Architecture · 3. Client-side Integration · System Design | MASST Docs Micro-frontends Architecture — Client-side Integration: flowchart covering Shell App, Catalog MFE, Cart MFE, Checkout MFE, React Runtime. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142506/masst-docs/sd/micro-frontends-architecture/communication-patterns-000036.png Micro-frontends Architecture · Communication Patterns · System Design | MASST Docs Micro-frontends Architecture — Communication Patterns: flowchart covering Cart MFE, Window/Document, Header MFE, Product MFE, Shared Store. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142515/masst-docs/sd/micro-frontends-architecture/routing-strategies-00002a.png Micro-frontends Architecture · Routing Strategies · System Design | MASST Docs Micro-frontends Architecture — Routing Strategies: flowchart covering App Shell Router, Catalog MFE, Cart MFE, Checkout MFE, Profile MFE. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142520/masst-docs/sd/micro-frontends-architecture/solutions-000047.png Micro-frontends Architecture · Solutions · System Design | MASST Docs Micro-frontends Architecture — Solutions: flowchart covering MFE 1 + React 18, MFE 2 + React 18, MFE 3 + React 18, Total: 3x React loaded, Shell loads React 18. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142531/masst-docs/sd/micro-frontends-architecture/testing-pyramid-for-micro-frontends-00000e.png Micro-frontends Architecture · Testing Pyramid for Micro Frontends · System Design | MASST Docs Micro-frontends Architecture — Testing Pyramid for Micro Frontends: flowchart covering E2E Tests - Full Integration, Integration Tests - MFE Composition, Contract Tests - API/Event… Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142541/masst-docs/sd/micro-frontends-architecture/real-world-example-00007d.png Micro-frontends Architecture · Real-World Example · System Design | MASST Docs Micro-frontends Architecture — Real-World Example: flowchart covering App Shell, Navigation MFE, Browse MFE, Player MFE, Search MFE. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/fundamentals/microservices https://res.cloudinary.com/ddg380vsg/image/upload/v1782142557/masst-docs/sd/microservices-architecture/monolith-vs-microservices-00004f.png Microservices Architecture · Monolith vs Microservices · System Design | MASST Docs Microservices Architecture — Monolith vs Microservices: flowchart covering Single Codebase, Single Database, Single Deployment, Tightly Coupled Modules, User Service. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142572/masst-docs/sd/microservices-architecture/communication-patterns-000014.png Microservices Architecture · Communication Patterns · System Design | MASST Docs Microservices Architecture — Communication Patterns: flowchart covering Service A, Service B, Service C, Message Queue, Service D. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142581/masst-docs/sd/microservices-architecture/api-gateway-pattern-000044.png Microservices Architecture · API Gateway Pattern · System Design | MASST Docs Microservices Architecture — API Gateway Pattern: flowchart covering Mobile/Web Client, API Gateway, Auth Service, User Service, Order Service. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142600/masst-docs/sd/microservices-architecture/service-discovery-000068.png Microservices Architecture · Service Discovery · System Design | MASST Docs Microservices Architecture — Service Discovery: flowchart covering Service A, Service B, Service C. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142611/masst-docs/sd/microservices-architecture/circuit-breaker-pattern-00001b.png Microservices Architecture · Circuit Breaker Pattern · System Design | MASST Docs Microservices Architecture — Circuit Breaker Pattern: state machine. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142619/masst-docs/sd/microservices-architecture/saga-pattern-distributed-transactions-00006c.png Microservices Architecture · Saga Pattern (Distributed Transactions) · System Design | MASST Docs Microservices Architecture — Saga Pattern (Distributed Transactions): sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142625/masst-docs/sd/microservices-architecture/cqrs-command-query-responsibility-segregation-00002a.png Microservices Architecture · CQRS (Command Query Responsibility Segregation) · System Design | MASST Docs Microservices Architecture — CQRS (Command Query Responsibility Segregation): flowchart covering Write API, Event Sync, Read API. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142631/masst-docs/sd/microservices-architecture/orchestration-000069.png Microservices Architecture · Orchestration · System Design | MASST Docs Microservices Architecture — Orchestration: flowchart covering Control Plane, Worker Node 1, User Service Pod, Worker Node 2, Order Service Pod. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/fundamentals/monorepo https://res.cloudinary.com/ddg380vsg/image/upload/v1782142644/masst-docs/sd/monorepo-vs-multi-repo/architecture-comparison-000016.png Monorepo vs Multi-repo · Architecture Comparison · System Design | MASST Docs Monorepo vs Multi-repo — Architecture Comparison: flowchart covering Frontend App, Backend API, Shared Utils, UI Components, Auth Service. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142649/masst-docs/sd/monorepo-vs-multi-repo/key-benefits-000064.png Monorepo vs Multi-repo · Key Benefits · System Design | MASST Docs Monorepo vs Multi-repo — Key Benefits: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142654/masst-docs/sd/monorepo-vs-multi-repo/monorepo-tooling-000012.png Monorepo vs Multi-repo · Monorepo Tooling · System Design | MASST Docs Monorepo vs Multi-repo — Monorepo Tooling: flowchart covering Turborepo, Bazel, Lerna, pnpm workspaces, Yarn workspaces. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142659/masst-docs/sd/monorepo-vs-multi-repo/task-orchestration-000063.png Monorepo vs Multi-repo · Task Orchestration · System Design | MASST Docs Monorepo vs Multi-repo — Task Orchestration: flowchart covering Lint, Type Check, Test, Build, Build UI. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142665/masst-docs/sd/monorepo-vs-multi-repo/nx-000000.png Monorepo vs Multi-repo · Nx · System Design | MASST Docs Monorepo vs Multi-repo — Nx: flowchart covering Change in utils/, Affected Detection, Skip: auth-service, Skip: payment-service, Run: web-app. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142673/masst-docs/sd/monorepo-vs-multi-repo/codeowners-in-service-payments-00003e.png Monorepo vs Multi-repo · CODEOWNERS in service-payments/ · System Design | MASST Docs Monorepo vs Multi-repo — CODEOWNERS in service-payments/: flowchart covering v1.0.0, v1.1.0, v2.0.0, v3.2.0, v3.2.1. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142680/masst-docs/sd/monorepo-vs-multi-repo/multi-repo-challenges-solutions-000013.png Monorepo vs Multi-repo · Multi-repo Challenges & Solutions · System Design | MASST Docs Monorepo vs Multi-repo — Multi-repo Challenges & Solutions: flowchart covering Web App, ui-components v2.1.0, common-utils v1.5.0, common-utils v1.3.0, Version Conflict!. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142685/masst-docs/sd/monorepo-vs-multi-repo/hybrid-approaches-000070.png Monorepo vs Multi-repo · Hybrid Approaches · System Design | MASST Docs Monorepo vs Multi-repo — Hybrid Approaches: flowchart covering Web App, Mobile App, Admin Dashboard, UI Components, TypeScript Types. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142690/masst-docs/sd/monorepo-vs-multi-repo/decision-framework-000024.png Monorepo vs Multi-repo · Decision Framework · System Design | MASST Docs Monorepo vs Multi-repo — Decision Framework: flowchart covering Start, Team Size?, Consider Monorepo, Consider Multi-repo, Code Sharing Needs?. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/fundamentals/replication https://res.cloudinary.com/ddg380vsg/image/upload/v1782142695/masst-docs/sd/replication/single-leader-primary-replica-000012.png Replication · Single-Leader (Primary-Replica) · System Design | MASST Docs Replication — Single-Leader (Primary-Replica): flowchart covering Writes, Leader, Follower 1, Follower 2, Follower 3. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142700/masst-docs/sd/replication/multi-leader-master-master-000065.png Replication · Multi-Leader (Master-Master) · System Design | MASST Docs Replication — Multi-Leader (Master-Master): flowchart covering Leader A…, Leader B…, Follower. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142704/masst-docs/sd/replication/leaderless-peer-to-peer-000010.png Replication · Leaderless (Peer-to-Peer) · System Design | MASST Docs Replication — Leaderless (Peer-to-Peer): flowchart covering Node A, Node B, Node C, Client. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142713/masst-docs/sd/replication/synchronous-replication-00004b.png Replication · Synchronous Replication · System Design | MASST Docs Replication — Synchronous Replication: sequence diagram covering all confirmed. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142719/masst-docs/sd/replication/asynchronous-replication-000075.png Replication · Asynchronous Replication · System Design | MASST Docs Replication — Asynchronous Replication: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142724/masst-docs/sd/replication/semi-synchronous-00003c.png Replication · Semi-Synchronous · System Design | MASST Docs Replication — Semi-Synchronous: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142729/masst-docs/sd/replication/problems-caused-by-lag-000019.png Replication · Problems Caused by Lag · System Design | MASST Docs Replication — Problems Caused by Lag: sequence diagram covering hasn't received write yet. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142742/masst-docs/sd/replication/problems-caused-by-lag-000003.png Replication · Problems Caused by Lag · System Design | MASST Docs Replication — Problems Caused by Lag: sequence diagram covering has data ✓, missing data ✗. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/fundamentals/strong-consistency https://res.cloudinary.com/ddg380vsg/image/upload/v1782142751/masst-docs/sd/strong-consistency/how-it-works-000073.png Strong Consistency · How It Works · System Design | MASST Docs Strong Consistency — How It Works: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142756/masst-docs/sd/strong-consistency/single-leader-primary-backup-00003d.png Strong Consistency · Single Leader (Primary-Backup) · System Design | MASST Docs Strong Consistency — Single Leader (Primary-Backup): flowchart covering All writes, Leader, Followers, All reads. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142771/masst-docs/sd/strong-consistency/two-phase-commit-2pc-000059.png Strong Consistency · Two-Phase Commit (2PC) · System Design | MASST Docs Strong Consistency — Two-Phase Commit (2PC): sequence diagram covering if all yes, if any no. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/fundamentals/vector-clocks https://res.cloudinary.com/ddg380vsg/image/upload/v1782142781/masst-docs/sd/vector-clocks/the-problem-with-physical-clocks-000023.png Vector Clocks · The Problem with Physical Clocks · System Design | MASST Docs Vector Clocks — Problem with Physical Clocks: sequence diagram covering clock fast, clock slow. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142786/masst-docs/sd/vector-clocks/example-00005c.png Vector Clocks · Example · System Design | MASST Docs Vector Clocks — Example: sequence diagram covering A:1, B:0, C:0, A:1, B:1, C:0, A:2, B:0, C:0, A:1, B:1, C:1, A:2, B:1, C:2. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142792/masst-docs/sd/vector-clocks/conflict-detection-000015.png Vector Clocks · Conflict Detection · System Design | MASST Docs Vector Clocks — Conflict Detection: flowchart covering Client 1: Write X=1 at…, Client 2: Write X=2 at…, Compare vectors, Concurrent! Conflict detected, Resolution strategy needed. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/fundamentals/weak-consistency https://res.cloudinary.com/ddg380vsg/image/upload/v1782142797/masst-docs/sd/weak-consistency/how-it-works-000044.png Weak Consistency · How It Works · System Design | MASST Docs Weak Consistency — How It Works: sequence diagram covering may or may not arrive, old value, null, or 1. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/index https://res.cloudinary.com/ddg380vsg/image/upload/v1782142802/masst-docs/sd/system-design-guide/how-the-sections-fit-together-00006b.png System Design Guide · How the Sections Fit Together · System Design | MASST Docs System Design Guide — How the Sections Fit Together: flowchart covering Fundamentals Scalability • CAP • Consistency • Microservices, Building Blocks Load Balancers • Caches •… Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142807/masst-docs/sd/system-design-guide/approach-cheat-sheet-000026.png System Design Guide · Approach Cheat Sheet · System Design | MASST Docs System Design Guide — Approach Cheat Sheet: flowchart covering 1. Clarify, 2. Estimate, 3. API design, 4. Data model, 5. High-level architecture. Part of the System Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/airline-management https://res.cloudinary.com/ddg380vsg/image/upload/v1782142812/masst-docs/lld/airline-management-system/class-diagram-000002.png Airline Management System · Class Diagram · Low-Level Design | MASST Docs Airline Management System — Class Diagram: class diagram covering -id, model -seatMap: Map~SeatClass, List~Seat~~, <<enum>> ECONOMY BUSINESS FIRST, -row, column, class, -code,… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142817/masst-docs/lld/airline-management-system/sequence-book-multi-leg-flight-00004c.png Airline Management System · Sequence: Book Multi-Leg Flight · Low-Level Design | MASST Docs Airline Management System — Sequence: Book Multi-Leg Flight: sequence diagram covering itin…, 12A, holdId, 14C, holdId, hold, payment. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/atm-system https://res.cloudinary.com/ddg380vsg/image/upload/v1782142828/masst-docs/lld/atm-system/high-level-architecture-000048.png ATM System · High-Level Architecture · Low-Level Design | MASST Docs ATM System — High-Level Architecture: flowchart covering Data Layer, Core Banking Interface, Transaction Processing, Network Layer, ATM Hardware Layer. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142833/masst-docs/lld/atm-system/1-atm-terminal-architecture-00006b.png ATM System · 1. ATM Terminal Architecture · Low-Level Design | MASST Docs ATM System — ATM Terminal Architecture: flowchart covering Cash Management, Communication, ATM Controller, ATM Hardware, Card Reader EMV Chip + Magnetic. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142852/masst-docs/lld/atm-system/2-card-authentication-system-00002d.png ATM System · 2. Card Authentication System · Low-Level Design | MASST Docs ATM System — Card Authentication System: flowchart covering Security Measures, EMV Processing, Authentication Flow, Card Types, EMV Chip Card Primary Auth. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142864/masst-docs/lld/atm-system/3-pin-security-architecture-000067.png ATM System · 3. PIN Security Architecture · Low-Level Design | MASST Docs ATM System — PIN Security Architecture: flowchart covering Security Standards, Key Hierarchy, HSM Processing, PIN Entry, Encrypted PIN Pad Hardware Encryption. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142879/masst-docs/lld/atm-system/4-transaction-processing-engine-00007f.png ATM System · 4. Transaction Processing Engine · Low-Level Design | MASST Docs ATM System — Transaction Processing Engine: flowchart covering Response Codes, Authorization Flow, Processing Steps, Transaction Types, Cash Withdrawal Primary Function. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142890/masst-docs/lld/atm-system/5-cash-inventory-management-000062.png ATM System · 5. Cash Inventory Management · Low-Level Design | MASST Docs ATM System — Cash Inventory Management: flowchart covering Denomination Management, Cash Positions, Inventory Operations, Cash Tracking, Cassette Count Per Denomination. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142901/masst-docs/lld/atm-system/6-fraud-detection-system-00001d.png ATM System · 6. Fraud Detection System · Low-Level Design | MASST Docs ATM System — Fraud Detection System: flowchart covering Response Actions, Real-time Checks, Risk Indicators, Detection Methods, Rule Engine Business Rules. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142910/masst-docs/lld/atm-system/1-message-format-000040.png ATM System · 1. Message Format · Low-Level Design | MASST Docs ATM System — Message Format: flowchart covering Response Elements, Key Data Elements, Common MTIs, Message Structure, Message Type Indicator 4 digits. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142916/masst-docs/lld/atm-system/2-transaction-flow-00004f.png ATM System · 2. Transaction Flow · Low-Level Design | MASST Docs ATM System — Transaction Flow: sequence diagram covering Same Bank, Different Bank. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142921/masst-docs/lld/atm-system/1-oracle-database-primary-000002.png ATM System · 1. Oracle Database (Primary) · Low-Level Design | MASST Docs ATM System — Oracle Database (Primary): flowchart covering Tables, Schema Design, Data Guard, RAC Cluster, Database Clusters. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142932/masst-docs/lld/atm-system/2-redis-cache-layer-000047.png ATM System · 2. Redis Cache Layer · Low-Level Design | MASST Docs ATM System — Redis Cache Layer: flowchart covering TTL Policies, Cache Data, Redis Cluster, Master 1 Balance Cache, Replica 1 Read Scaling. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142946/masst-docs/lld/atm-system/3-audit-logging-000035.png ATM System · 3. Audit Logging · Low-Level Design | MASST Docs ATM System — Audit Logging: flowchart covering Log Analysis, Compliance Requirements, Log Storage, Audit Events, Transaction Events All ATM Transactions. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142955/masst-docs/lld/atm-system/1-atm-network-topology-00007c.png ATM System · 1. ATM Network Topology · Low-Level Design | MASST Docs ATM System — ATM Network Topology: flowchart covering External Networks, ATM Switch Layer, Network Connectivity, ATM Sites, Branch ATMs Bank Premises. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142965/masst-docs/lld/atm-system/2-security-architecture-00000a.png ATM System · 2. Security Architecture · Low-Level Design | MASST Docs ATM System — Security Architecture: flowchart covering Encryption, Application Security, Network Security, Physical Security, ATM Safe Reinforced Steel. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142973/masst-docs/lld/atm-system/1-ha-architecture-000002.png ATM System · 1. HA Architecture · Low-Level Design | MASST Docs ATM System — HA Architecture: flowchart covering Failover Scenarios, HSM HA, Database HA, ATM Switch HA, Active Switch Primary Processing. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142984/masst-docs/lld/atm-system/2-disaster-recovery-00002c.png ATM System · 2. Disaster Recovery · Low-Level Design | MASST Docs ATM System — Disaster Recovery: flowchart covering DR Testing, DR Procedures, Recovery Metrics, DR Strategy, Active-Active Dual Site. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142994/masst-docs/lld/atm-system/1-monitoring-dashboard-000027.png ATM System · 1. Monitoring Dashboard · Low-Level Design | MASST Docs ATM System — Monitoring Dashboard: flowchart covering Security Monitoring, Network Monitoring, Transaction Monitoring, ATM Monitoring, ATM Status Online/Offline. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782142999/masst-docs/lld/atm-system/2-key-performance-indicators-000019.png ATM System · 2. Key Performance Indicators · Low-Level Design | MASST Docs ATM System — Key Performance Indicators: flowchart covering Customer KPIs, Cash KPIs, Performance KPIs, Availability KPIs, ATM Uptime Target: 99.5%. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143009/masst-docs/lld/atm-system/1-pci-dss-compliance-000048.png ATM System · 1. PCI DSS Compliance · Low-Level Design | MASST Docs ATM System — PCI DSS Compliance: flowchart covering Assessment, PCI PIN Security, PCI Requirements, Req 1: Firewall Network Security, Req 3: Protect Data Encryption at Rest. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143296/masst-docs/lld/atm-system/2-settlement-reconciliation-000053.png ATM System · 2. Settlement & Reconciliation · Low-Level Design | MASST Docs ATM System — Settlement & Reconciliation: flowchart covering Reports, Exception Handling, Reconciliation, Settlement Process, End of Day Cutoff Time. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143306/masst-docs/lld/atm-system/1-software-deployment-pipeline-000006.png ATM System · 1. Software Deployment Pipeline · Low-Level Design | MASST Docs ATM System — Software Deployment Pipeline: architecture diagram. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143311/masst-docs/lld/atm-system/1-software-deployment-pipeline-000004.png ATM System · 1. Software Deployment Pipeline · Low-Level Design | MASST Docs ATM System — Software Deployment Pipeline: flowchart covering Rollback, Deployment, Certification, Development, Code Commit. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143316/masst-docs/lld/atm-system/3-resilience-testing-00006e.png ATM System · 3. Resilience Testing · Low-Level Design | MASST Docs ATM System — Resilience Testing: flowchart covering Validation, Target Systems, Test Scenarios, Network Failure Primary Link Down, Host Failure Switch Unavailable. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143321/masst-docs/lld/atm-system/1-infrastructure-cost-distribution-000033.png ATM System · 1. Infrastructure Cost Distribution · Low-Level Design | MASST Docs ATM System — Infrastructure Cost Distribution: distribution chart. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143326/masst-docs/lld/atm-system/2-cost-optimization-strategies-000077.png ATM System · 2. Cost Optimization Strategies · Low-Level Design | MASST Docs ATM System — Cost Optimization Strategies: flowchart covering Network Optimization, Operations Optimization, Cash Optimization, Hardware Optimization, Lifecycle Management 7-10… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143336/masst-docs/lld/atm-system/1-emerging-technologies-00000e.png ATM System · 1. Emerging Technologies · Low-Level Design | MASST Docs ATM System — Emerging Technologies: flowchart covering Infrastructure Evolution, AI & Analytics, Biometric Evolution, Cardless & Digital, Mobile-First App-based Banking. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143342/masst-docs/lld/atm-system/1-next-gen-atm-features-00000f.png ATM System · 1. Next-Gen ATM Features · Low-Level Design | MASST Docs ATM System — Next-Gen ATM Features: flowchart covering Security Innovations, Smart ATM, Enhanced Services, Cardless ATM, QR Code Mobile App Scan. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/cache-lru-lfu https://res.cloudinary.com/ddg380vsg/image/upload/v1782143347/masst-docs/lld/in-memory-cache-lru-lfu/lru-doubly-linked-list-hashmap-000043.png In-Memory Cache (LRU / LFU) · LRU: Doubly-Linked List + HashMap · Low-Level Design | MASST Docs In-Memory Cache (LRU / LFU) — LRU: Doubly-Linked List + HashMap: flowchart covering k1: v1, k2: v2, k3: v3, Map: k1->N1, k2->N2, k3->N3. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/car-rental https://res.cloudinary.com/ddg380vsg/image/upload/v1782143353/masst-docs/lld/car-rental-system/class-diagram-00005a.png Car Rental System · Class Diagram · Low-Level Design | MASST Docs Car Rental System — Class Diagram: class diagram covering <<enum>> ECONOMY SEDAN SUV LUXURY, <<enum>> AVAILABLE RESERVED RENTED IN_MAINTENANCE, -id, name, location, fleet, -id,… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143358/masst-docs/lld/car-rental-system/sequence-reservation-pickup-return-000018.png Car Rental System · Sequence: Reservation → Pickup → Return · Low-Level Design | MASST Docs Car Rental System — Sequence: Reservation → Pickup → Return: sequence diagram covering type, branch, slot, reservation, mileage, fuel, RENTED, rental, mileage, fuel, damages,… Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/chess-game https://res.cloudinary.com/ddg380vsg/image/upload/v1782143365/masst-docs/lld/chess-game/class-diagram-000040.png Chess Game · Class Diagram · Low-Level Design | MASST Docs Chess Game — Class Diagram: class diagram covering <<enum>> WHITE BLACK, <<abstract>> -color: Color +canMove…, -row: int -col: int -piece: Piece, -cells: Cell…, row, col. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143378/masst-docs/lld/chess-game/state-pattern-for-gamestatus-000022.png Chess Game · State Pattern for GameStatus · Low-Level Design | MASST Docs Chess Game — State Pattern for GameStatus: state machine. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/elevator-system https://res.cloudinary.com/ddg380vsg/image/upload/v1782143389/masst-docs/lld/elevator-system/high-level-architecture-000074.png Elevator System · High-Level Architecture · Low-Level Design | MASST Docs Elevator System — High-Level Architecture: flowchart covering Cars, Control, User input, External Button per floor, Internal Button per car. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143403/masst-docs/lld/elevator-system/class-diagram-00002d.png Elevator System · Class Diagram · Low-Level Design | MASST Docs Elevator System — Class Diagram: class diagram covering <<enum>> UP DOWN IDLE, <<enum>> MOVING STOPPED DOOR_OPEN MAINTENANCE, -floor: int -direction: Direction -timestamp: long,… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143409/masst-docs/lld/elevator-system/sequence-external-request-00006f.png Elevator System · Sequence: External Request · Low-Level Design | MASST Docs Elevator System — Sequence: External Request: sequence diagram covering 7, UP, req, cars. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/file-system https://res.cloudinary.com/ddg380vsg/image/upload/v1782143416/masst-docs/lld/in-memory-file-system/class-diagram-000016.png In-Memory File System · Class Diagram · Low-Level Design | MASST Docs In-Memory File System — Class Diagram: class diagram covering <<abstract>> -name: String +isDirectory, -children: SortedMap~String, FsNode~ +addChild…, -content: StringBuilder… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143421/masst-docs/lld/in-memory-file-system/sequence-addcontenttofile-a-b-c-txt-hello-000058.png In-Memory File System · Sequence: `addContentToFile("/a/b/c.txt", "hello")` · Low-Level Design | MASST Docs In-Memory File System — Sequence: `addContentToFile("/a/b/c.txt", "hello")`: sequence diagram covering c.txt. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/food-delivery https://res.cloudinary.com/ddg380vsg/image/upload/v1782143436/masst-docs/lld/food-delivery/class-diagram-000016.png Food Delivery · Class Diagram · Low-Level Design | MASST Docs Food Delivery — Class Diagram: class diagram covering -id, name, addresses, phone, -categories: List, -id, name, price, available, -id, name, location, status, -subtotal,… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143450/masst-docs/lld/food-delivery/order-lifecycle-state-pattern-000050.png Food Delivery · Order Lifecycle (State Pattern) · Low-Level Design | MASST Docs Food Delivery — Order Lifecycle (State Pattern): state machine. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143460/masst-docs/lld/food-delivery/sequence-place-order-delivery-000060.png Food Delivery · Sequence: Place Order → Delivery · Low-Level Design | MASST Docs Food Delivery — Sequence: Place Order → Delivery: sequence diagram covering cart, address, orderId. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/hotel-booking https://res.cloudinary.com/ddg380vsg/image/upload/v1782143470/masst-docs/lld/hotel-booking-system/class-diagram-00007d.png Hotel Booking System · Class Diagram · Low-Level Design | MASST Docs Hotel Booking System — Class Diagram: class diagram covering -id, name, address, rooms, <<enum>> STANDARD DELUXE SUITE, -roomNumber, type, hotel, status -basePricePerNight:… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143482/masst-docs/lld/hotel-booking-system/inventory-per-date-availability-00000d.png Hotel Booking System · Inventory: Per-Date Availability · Low-Level Design | MASST Docs Hotel Booking System — Inventory: Per-Date Availability: flowchart covering Booking time, Reserve quantity: 1 deluxe for Jul 5-7, Inventory counter: deluxe-Jul5--, Jul6--,… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143497/masst-docs/lld/hotel-booking-system/sequence-search-book-check-in-check-out-000040.png Hotel Booking System · Sequence: Search → Book → Check-in → Check-out · Low-Level Design | MASST Docs Hotel Booking System — Sequence: Search → Book → Check-in → Check-out: sequence diagram covering city, dates, type, hotel, type, dates, 304, OCCUPIED, AVAILABLE. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/inventory-management https://res.cloudinary.com/ddg380vsg/image/upload/v1782143509/masst-docs/lld/inventory-management-system/class-diagram-000079.png Inventory Management System · Class Diagram · Low-Level Design | MASST Docs Inventory Management System — Class Diagram: class diagram covering -id, name, location, -sku, warehouse -onHand: int -reserved: int, <<abstract>> -id, sku, qty, when, +reserve…… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143519/masst-docs/lld/inventory-management-system/stockitem-per-sku-per-warehouse-00004c.png Inventory Management System · StockItem (Per-SKU, Per-Warehouse) · Low-Level Design | MASST Docs Inventory Management System — StockItem (Per-SKU, Per-Warehouse): flowchart covering onHand: 100, reserve 30, onHand: 100 reserved: 30 available: 70, commit reservation, onHand:… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143525/masst-docs/lld/inventory-management-system/sequence-order-reserve-commit-000061.png Inventory Management System · Sequence: Order Reserve → Commit · Low-Level Design | MASST Docs Inventory Management System — Sequence: Order Reserve → Commit: sequence diagram covering sku=A, wh=W1, qty=3. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/library-management https://res.cloudinary.com/ddg380vsg/image/upload/v1782143539/masst-docs/lld/library-management-system/domain-model-000037.png Library Management System · Domain Model · Low-Level Design | MASST Docs Library Management System — Domain Model: class diagram covering -isbn: String -title: String -authors: List -subject: String, <<enum>> AVAILABLE CHECKED_OUT RESERVED LOST… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143545/masst-docs/lld/library-management-system/sequence-checkout-000024.png Library Management System · Sequence: Checkout · Low-Level Design | MASST Docs Library Management System — Sequence: Checkout: sequence diagram covering member, copyId, copy, member, 14 days. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/linkedin-connections https://res.cloudinary.com/ddg380vsg/image/upload/v1782143556/masst-docs/lld/linkedin-connections/class-diagram-00004b.png LinkedIn Connections · Class Diagram · Low-Level Design | MASST Docs LinkedIn Connections — Class Diagram: class diagram covering -id, name, headline, location, -experiences, education, skills, certifications, <<enum>> PENDING CONNECTED DECLINED… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143561/masst-docs/lld/linkedin-connections/sequence-send-accept-000078.png LinkedIn Connections · Sequence: Send → Accept · Low-Level Design | MASST Docs LinkedIn Connections — Sequence: Send → Accept: sequence diagram covering Alice, Bob, msg, PENDING, reqId, Alice, Bob, Alice. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/logger https://res.cloudinary.com/ddg380vsg/image/upload/v1782143585/masst-docs/lld/logger-utility-log4j-style/class-diagram-00001b.png Logger Utility (Log4j-style) · Class Diagram · Low-Level Design | MASST Docs Logger Utility (Log4j-style) — Class Diagram: class diagram covering <<enum>> TRACE DEBUG INFO WARN ERROR FATAL, -name: String -level: LogLevel -appenders: List +info…, msg, t,… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143597/masst-docs/lld/logger-utility-log4j-style/sequence-000047.png Logger Utility (Log4j-style) · Sequence · Low-Level Design | MASST Docs Logger Utility (Log4j-style) — Sequence: sequence diagram. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/meeting-scheduler https://res.cloudinary.com/ddg380vsg/image/upload/v1782143613/masst-docs/lld/meeting-scheduler/class-diagram-000073.png Meeting Scheduler · Class Diagram · Low-Level Design | MASST Docs Meeting Scheduler — Class Diagram: class diagram covering -id: String -email: String, -start: Instant -end: Instant, -rooms: List -byUser: Map +findAvailableRooms…, +sendInvite…. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143623/masst-docs/lld/meeting-scheduler/sequence-book-a-meeting-00000c.png Meeting Scheduler · Sequence: Book a Meeting · Low-Level Design | MASST Docs Meeting Scheduler — Sequence: Book a Meeting: sequence diagram covering organizer, attendees, room, slot. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/movie-booking https://res.cloudinary.com/ddg380vsg/image/upload/v1782143629/masst-docs/lld/movie-ticket-booking-bookmyshow/class-diagram-000036.png Movie Ticket Booking (BookMyShow) · Class Diagram · Low-Level Design | MASST Docs Movie Ticket Booking (BookMyShow) — Class Diagram: class diagram covering -id, name, -id, name, city, screens, -id, cinema, name, seats, -id, row, column, type, <<enum>> REGULAR… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143639/masst-docs/lld/movie-ticket-booking-bookmyshow/seat-selection-lifecycle-000045.png Movie Ticket Booking (BookMyShow) · Seat Selection Lifecycle · Low-Level Design | MASST Docs Movie Ticket Booking (BookMyShow) — Seat Selection Lifecycle: state machine covering after refund. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143645/masst-docs/lld/movie-ticket-booking-bookmyshow/sequence-two-concurrent-bookings-00004d.png Movie Ticket Booking (BookMyShow) · Sequence: Two Concurrent Bookings · Low-Level Design | MASST Docs Movie Ticket Booking (BookMyShow) — Sequence: Two Concurrent Bookings: sequence diagram covering show…, waits for Alice's release, hold, payment. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/online-shopping-cart https://res.cloudinary.com/ddg380vsg/image/upload/v1782143657/masst-docs/lld/online-shopping-cart/class-diagram-000003.png Online Shopping Cart · Class Diagram · Low-Level Design | MASST Docs Online Shopping Cart — Class Diagram: class diagram covering -id, name, sku, price, stock, -product: Product -quantity: int, <<interface>> +discount…, -subtotal, discount, tax,… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143663/masst-docs/lld/online-shopping-cart/sequence-place-order-000035.png Online Shopping Cart · Sequence: Place Order · Low-Level Design | MASST Docs Online Shopping Cart — Sequence: Place Order: sequence diagram covering cart, address, method, cart, address, total, method, idempotencyKey, Order. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/parking-lot https://res.cloudinary.com/ddg380vsg/image/upload/v1782143669/masst-docs/lld/parking-lot-system-design/class-diagram-000020.png Parking Lot System Design · Class Diagram · Low-Level Design | MASST Docs Parking Lot System Design — Class Diagram: class diagram covering Vehicle, ParkingTicket, VehicleType. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/rate-limiter-lld https://res.cloudinary.com/ddg380vsg/image/upload/v1782143674/masst-docs/lld/rate-limiter-lld/class-diagram-000000.png Rate Limiter (LLD) · Class Diagram · Low-Level Design | MASST Docs Rate Limiter (LLD) — Class Diagram: class diagram covering <<interface>> +tryAcquire…. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143680/masst-docs/lld/rate-limiter-lld/choosing-an-algorithm-00001d.png Rate Limiter (LLD) · Choosing an Algorithm · Low-Level Design | MASST Docs Rate Limiter (LLD) — Choosing an Algorithm: flowchart covering Need rate limiting, Allow bursts?, Token Bucket, Leaky Bucket, Fixed Window. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/snake-and-ladder https://res.cloudinary.com/ddg380vsg/image/upload/v1782143689/masst-docs/lld/snake-and-ladder/class-diagram-000051.png Snake and Ladder · Class Diagram · Low-Level Design | MASST Docs Snake and Ladder — Class Diagram: class diagram covering -rng: Random -sides: int -count: int +roll, -name: String -position: int +move…, -head: int -tail: int, -bottom: int… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143702/masst-docs/lld/snake-and-ladder/sequence-00007d.png Snake and Ladder · Sequence · Low-Level Design | MASST Docs Snake and Ladder — Sequence: sequence diagram covering currentPos=22, 4. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/splitwise https://res.cloudinary.com/ddg380vsg/image/upload/v1782143715/masst-docs/lld/splitwise/domain-model-00007f.png Splitwise · Domain Model · Low-Level Design | MASST Docs Splitwise — Domain Model: class diagram covering -id: String -name: String -email: String, -id: String -name: String -members: List -expenses: List, <<interface>> +split…,… Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/stack-overflow https://res.cloudinary.com/ddg380vsg/image/upload/v1782143725/masst-docs/lld/stack-overflow/class-diagram-00003c.png Stack Overflow · Class Diagram · Low-Level Design | MASST Docs Stack Overflow — Class Diagram: class diagram covering -id, name, reputation, badges, -title: String -tags: Set -answers: List -acceptedAnswer, -question -isAccepted: bool, -id,… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143730/masst-docs/lld/stack-overflow/sequence-vote-on-answer-00005a.png Stack Overflow · Sequence: Vote on Answer · Low-Level Design | MASST Docs Stack Overflow — Sequence: Vote on Answer: sequence diagram covering user, answer, UP, answer.author, UP, toggle off. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/tic-tac-toe https://res.cloudinary.com/ddg380vsg/image/upload/v1782143746/masst-docs/lld/tic-tac-toe/class-diagram-000043.png Tic-Tac-Toe · Class Diagram · Low-Level Design | MASST Docs Tic-Tac-Toe — Class Diagram: class diagram covering <<enum>> X O EMPTY, -name: String -symbol: Symbol, -size: int -cells: Symbol, row, col, symbol, -board: Board -players:… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143765/masst-docs/lld/tic-tac-toe/sequence-000050.png Tic-Tac-Toe · Sequence · Low-Level Design | MASST Docs Tic-Tac-Toe — Sequence: sequence diagram covering row, col, row, col, symbol, true/false. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/traffic-signal https://res.cloudinary.com/ddg380vsg/image/upload/v1782143777/masst-docs/lld/traffic-signal-control/state-machine-single-intersection-000002.png Traffic Signal Control · State Machine (single intersection) · Low-Level Design | MASST Docs Traffic Signal Control — State Machine (single intersection): state machine. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143792/masst-docs/lld/traffic-signal-control/class-diagram-000048.png Traffic Signal Control · Class Diagram · Low-Level Design | MASST Docs Traffic Signal Control — Class Diagram: class diagram covering <<enum>> NORTH_SOUTH EAST_WEST, -state: SignalState -duration: Duration, -direction -light: Light, <<enum>> RED… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143805/masst-docs/lld/traffic-signal-control/sequence-emergency-vehicle-000041.png Traffic Signal Control · Sequence: Emergency Vehicle · Low-Level Design | MASST Docs Traffic Signal Control — Sequence: Emergency Vehicle: sequence diagram. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/case-studies/vending-machine https://res.cloudinary.com/ddg380vsg/image/upload/v1782143818/masst-docs/lld/vending-machine/state-machine-00004f.png Vending Machine · State Machine · Low-Level Design | MASST Docs Vending Machine — State Machine: state machine. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143824/masst-docs/lld/vending-machine/class-diagram-000043.png Vending Machine · Class Diagram · Low-Level Design | MASST Docs Vending Machine — Class Diagram: class diagram covering <<interface>> +selectItem…, vm, coin, -slots: Map~String,Slot~ +get…, -code: String -name: String -priceCents: int,… Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/concurrency/producer-consumer https://res.cloudinary.com/ddg380vsg/image/upload/v1782143829/masst-docs/lld/producer-consumer/structure-000051.png Producer-Consumer · Structure · Low-Level Design | MASST Docs Producer-Consumer — Structure: flowchart covering Producer 1, Producer 2, Producer 3, Consumer 1, Consumer 2. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/concurrency/read-write-lock https://res.cloudinary.com/ddg380vsg/image/upload/v1782143834/masst-docs/lld/read-write-lock/when-r-w-locks-pay-off-000042.png Read-Write Lock · When R/W Locks Pay Off · Low-Level Design | MASST Docs Read-Write Lock — When R/W Locks Pay Off: flowchart covering Balanced (50/50), Read-heavy (95% reads), Mutex: serialized throughput = 1x, R/W Lock: parallel reads throughput =… Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/concurrency/thread-pool https://res.cloudinary.com/ddg380vsg/image/upload/v1782143839/masst-docs/lld/thread-pool/structure-00003e.png Thread Pool · Structure · Low-Level Design | MASST Docs Thread Pool — Structure: flowchart covering Submitted tasks, Worker 1, Worker 2, Worker 3, Worker 4. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143844/masst-docs/lld/thread-pool/lifecycle-000056.png Thread Pool · Lifecycle · Low-Level Design | MASST Docs Thread Pool — Lifecycle: state machine. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/concurrency/thread-safety https://res.cloudinary.com/ddg380vsg/image/upload/v1782143852/masst-docs/lld/thread-safety/when-to-use-which-000041.png Thread Safety · When to Use Which · Low-Level Design | MASST Docs Thread Safety — When to Use Which: flowchart covering Need thread safety?, Compound op or multiple fields?, synchronized or Lock, Single field, read-modify-write?, Atomic*. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/foundations/composition-vs-inheritance https://res.cloudinary.com/ddg380vsg/image/upload/v1782143862/masst-docs/lld/composition-vs-inheritance/why-favor-composition-over-inheritance-000029.png Composition vs Inheritance · Why "Favor Composition Over Inheritance" · Low-Level Design | MASST Docs Composition vs Inheritance — Why "Favor Composition Over Inheritance": flowchart covering Inheritance, Tight coupling to parent, Single parent only, Static at compile time,… Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143867/masst-docs/lld/composition-vs-inheritance/decision-heuristic-000039.png Composition vs Inheritance · Decision Heuristic · Low-Level Design | MASST Docs Composition vs Inheritance — Decision Heuristic: flowchart covering Need to reuse code?, Is X truly an 'is-a' Y?, Use composition, Will X be substituted everywhere Y is used?,… Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/foundations/coupling-cohesion https://res.cloudinary.com/ddg380vsg/image/upload/v1782143878/masst-docs/lld/coupling-cohesion/visualizing-the-two-000067.png Coupling & Cohesion · Visualizing the Two · Low-Level Design | MASST Docs Coupling & Cohesion — Visualizing the Two: flowchart covering Low coupling, high cohesion, High coupling, low cohesion, Class A, Class B, Class C. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/foundations/dry-kiss-yagni https://res.cloudinary.com/ddg380vsg/image/upload/v1782143882/masst-docs/lld/dry-kiss-yagni/kiss-keep-it-simple-stupid-00001b.png DRY, KISS, YAGNI · KISS — Keep It Simple, Stupid · Low-Level Design | MASST Docs DRY, KISS, YAGNI — KISS — Keep It Simple, Stupid: flowchart covering Problem, Simple solution works?, Ship it, Add complexity only as needed. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143887/masst-docs/lld/dry-kiss-yagni/when-the-three-conflict-000032.png DRY, KISS, YAGNI · When the Three Conflict · Low-Level Design | MASST Docs DRY, KISS, YAGNI — When the Three Conflict: flowchart covering New requirement, Does removing duplication add complexity?, Apply DRY, Will the abstraction be needed soon?, Apply… Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/foundations/oop-principles https://res.cloudinary.com/ddg380vsg/image/upload/v1782143894/masst-docs/lld/oop-principles/encapsulation-vs-abstraction-commonly-confused-00003a.png OOP Principles · Encapsulation vs Abstraction (commonly confused) · Low-Level Design | MASST Docs OOP Principles — Encapsulation vs Abstraction (commonly confused): flowchart covering Encapsulation, Internal state, Abstraction, Implementation complexity. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/foundations/uml-diagrams https://res.cloudinary.com/ddg380vsg/image/upload/v1782143899/masst-docs/lld/uml-diagrams/relationships-00007f.png UML Diagrams · Relationships · Low-Level Design | MASST Docs UML Diagrams — Relationships: class diagram covering <<abstract>> -licensePlate: String +getType, -horsepower: int, is-a. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143905/masst-docs/lld/uml-diagrams/sequence-diagram-00000c.png UML Diagrams · Sequence Diagram · Low-Level Design | MASST Docs UML Diagrams — Sequence Diagram: sequence diagram covering email, password. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143909/masst-docs/lld/uml-diagrams/activity-diagram-00006f.png UML Diagrams · Activity Diagram · Low-Level Design | MASST Docs UML Diagrams — Activity Diagram: flowchart covering Validate cart, In stock?, Charge payment, Paid?, Reserve inventory. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143914/masst-docs/lld/uml-diagrams/state-diagram-00001e.png UML Diagrams · State Diagram · Low-Level Design | MASST Docs UML Diagrams — State Diagram: state machine. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld https://res.cloudinary.com/ddg380vsg/image/upload/v1782143919/masst-docs/lld/low-level-design/recommended-reading-order-000010.png Low-Level Design · Recommended Reading Order · Low-Level Design | MASST Docs Low-Level Design — Recommended Reading Order: flowchart covering Foundations OOP + SOLID, Creational Patterns, Structural Patterns, Behavioral Patterns, Concurrency. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/behavioral/chain-of-responsibility https://res.cloudinary.com/ddg380vsg/image/upload/v1782143924/masst-docs/lld/chain-of-responsibility/structure-00001a.png Chain of Responsibility · Structure · Low-Level Design | MASST Docs Chain of Responsibility — Structure: class diagram covering <<abstract>> -next: Handler +setNext…, +handle…. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/behavioral/command https://res.cloudinary.com/ddg380vsg/image/upload/v1782143930/masst-docs/lld/command/structure-000069.png Command · Structure · Low-Level Design | MASST Docs Command — Structure: class diagram covering <<interface>> +execute, -receiver: Receiver +execute, +action, -command: Command +setCommand…. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/behavioral/iterator https://res.cloudinary.com/ddg380vsg/image/upload/v1782143937/masst-docs/lld/iterator/structure-000069.png Iterator · Structure · Low-Level Design | MASST Docs Iterator — Structure: class diagram covering <<interface>> +hasNext, <<interface>> +iterator, -items: T, -collection: ConcreteCollection -position: int +hasNext. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/behavioral/mediator https://res.cloudinary.com/ddg380vsg/image/upload/v1782143950/masst-docs/lld/mediator/the-problem-it-solves-000026.png Mediator · The Problem It Solves · Low-Level Design | MASST Docs Mediator — Problem It Solves: flowchart covering With mediator — N edges, Without mediator — N x N edges, Login Field, Password Field, Login Button. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143956/masst-docs/lld/mediator/structure-00007d.png Mediator · Structure · Low-Level Design | MASST Docs Mediator — Structure: class diagram covering <<interface>> +notify…, -componentA -componentB +notify…, <<abstract>> -mediator: Mediator. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/behavioral/memento https://res.cloudinary.com/ddg380vsg/image/upload/v1782143961/masst-docs/lld/memento/structure-000019.png Memento · Structure · Low-Level Design | MASST Docs Memento — Structure: class diagram covering -state: State +save, Memento, -state: State, -history: List~Memento~ +saveState…, Originator. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/behavioral/observer https://res.cloudinary.com/ddg380vsg/image/upload/v1782143966/masst-docs/lld/observer/structure-00007b.png Observer · Structure · Low-Level Design | MASST Docs Observer — Structure: class diagram covering -observers: List +attach…, Observer, <<interface>> +update…, +update…. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/behavioral/state https://res.cloudinary.com/ddg380vsg/image/upload/v1782143973/masst-docs/lld/state/structure-000011.png State · Structure · Low-Level Design | MASST Docs State — Structure: class diagram covering -state: State +setState…, <<interface>> +handle…, +handle…. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143978/masst-docs/lld/state/state-diagram-000069.png State · State Diagram · Low-Level Design | MASST Docs State — State Diagram: state machine. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/behavioral/strategy https://res.cloudinary.com/ddg380vsg/image/upload/v1782143984/masst-docs/lld/strategy/structure-00001d.png Strategy · Structure · Low-Level Design | MASST Docs Strategy — Structure: class diagram covering -strategy: Strategy +setStrategy…, <<interface>> +algorithm. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/behavioral/template-method https://res.cloudinary.com/ddg380vsg/image/upload/v1782143990/masst-docs/lld/template-method/structure-00003a.png Template Method · Structure · Low-Level Design | MASST Docs Template Method — Structure: class diagram covering +templateMethod. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782143995/masst-docs/lld/template-method/the-hollywood-principle-00003c.png Template Method · The Hollywood Principle · Low-Level Design | MASST Docs Template Method — Hollywood Principle: sequence diagram. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/behavioral/visitor https://res.cloudinary.com/ddg380vsg/image/upload/v1782144001/masst-docs/lld/visitor/structure-000027.png Visitor · Structure · Low-Level Design | MASST Docs Visitor — Structure: class diagram covering <<interface>> +accept…, +accept…, <<interface>> +visitA…, ElementB. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144006/masst-docs/lld/visitor/double-dispatch-00003c.png Visitor · Double Dispatch · Low-Level Design | MASST Docs Visitor — Double Dispatch: sequence diagram. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/creational/abstract-factory https://res.cloudinary.com/ddg380vsg/image/upload/v1782144012/masst-docs/lld/abstract-factory/structure-000002.png Abstract Factory · Structure · Low-Level Design | MASST Docs Abstract Factory — Structure: class diagram covering <<interface>> +createButton, +createButton, <<interface>>. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/creational/builder https://res.cloudinary.com/ddg380vsg/image/upload/v1782144020/masst-docs/lld/builder/class-diagram-00003c.png Builder · Class Diagram · Low-Level Design | MASST Docs Builder — Class Diagram: class diagram covering -sizeInches: int -crust: String -toppings: List -Pizza…, -sizeInches: int -crust: String +Builder…. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/creational/factory https://res.cloudinary.com/ddg380vsg/image/upload/v1782144025/masst-docs/lld/factory-method/class-diagram-000036.png Factory Method · Class diagram · Low-Level Design | MASST Docs Factory Method — Class diagram: class diagram covering <<interface>> +send…, +create…. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144031/masst-docs/lld/factory-method/factory-method-gof-000029.png Factory Method · Factory Method (GoF) · Low-Level Design | MASST Docs Factory Method — Factory Method (GoF): class diagram covering <<abstract>> +render, createButton, <<interface>>. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144039/masst-docs/lld/factory-method/when-to-use-which-00000e.png Factory Method · When to Use Which · Low-Level Design | MASST Docs Factory Method — When to Use Which: flowchart covering Need to create different concrete types, Selection driven by runtime input?, Simple Factory, Factory Method, Family of… Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/creational/prototype https://res.cloudinary.com/ddg380vsg/image/upload/v1782144046/masst-docs/lld/prototype/structure-000046.png Prototype · Structure · Low-Level Design | MASST Docs Prototype — Structure: class diagram covering <<interface>> +clone, -color: Color -coords: Point +clone, +useClone. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144053/masst-docs/lld/prototype/shallow-vs-deep-copy-000072.png Prototype · Shallow vs Deep Copy · Low-Level Design | MASST Docs Prototype — Shallow vs Deep Copy: flowchart covering Deep Copy, Shallow Copy, Original Person, Address obj, Copy Person. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/creational/singleton https://res.cloudinary.com/ddg380vsg/image/upload/v1782144060/masst-docs/lld/singleton/structure-000012.png Singleton · Structure · Low-Level Design | MASST Docs Singleton — Structure: class diagram covering -instance: Singleton$ -Singleton. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/structural/adapter https://res.cloudinary.com/ddg380vsg/image/upload/v1782144065/masst-docs/lld/adapter/structure-00005c.png Adapter · Structure · Low-Level Design | MASST Docs Adapter — Structure: class diagram covering <<interface>> +request, +specificRequest, -adaptee: Adaptee +request. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144071/masst-docs/lld/adapter/object-adapter-vs-class-adapter-000039.png Adapter · Object Adapter vs Class Adapter · Low-Level Design | MASST Docs Adapter — Object Adapter vs Class Adapter: flowchart covering Class Adapter (C++), Object Adapter, Adapter, Adaptee, Target Interface. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/structural/bridge https://res.cloudinary.com/ddg380vsg/image/upload/v1782144080/masst-docs/lld/bridge/the-class-explosion-problem-000054.png Bridge · The Class Explosion Problem · Low-Level Design | MASST Docs Bridge — Class Explosion Problem: flowchart covering Shape, VectorCircle, VectorSquare, RasterCircle, RasterSquare. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144090/masst-docs/lld/bridge/bridge-fix-00004a.png Bridge · Bridge fix · Low-Level Design | MASST Docs Bridge — Bridge fix: flowchart covering Implementation hierarchy, Abstraction hierarchy, Shape, Circle, Square. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144103/masst-docs/lld/bridge/structure-00005a.png Bridge · Structure · Low-Level Design | MASST Docs Bridge — Structure: class diagram covering -implementor: Implementor +operation, <<interface>> +operationImpl. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/structural/composite https://res.cloudinary.com/ddg380vsg/image/upload/v1782144118/masst-docs/lld/composite/structure-00007b.png Composite · Structure · Low-Level Design | MASST Docs Composite — Structure: class diagram covering <<interface>> +operation, +operation, -children: List +add…, Component. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144131/masst-docs/lld/composite/class-diagram-000069.png Composite · Class Diagram · Low-Level Design | MASST Docs Composite — Class Diagram: class diagram covering <<interface>> +name, -name: String -size: long +sizeBytes, -name: String -children: List~FsNode~ +add…, FsNode. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/structural/decorator https://res.cloudinary.com/ddg380vsg/image/upload/v1782144141/masst-docs/lld/decorator/structure-000065.png Decorator · Structure · Low-Level Design | MASST Docs Decorator — Structure: class diagram covering <<interface>> +operation, +operation, <<abstract>> -wrapped: Component +operation. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144150/masst-docs/lld/decorator/decorator-vs-inheritance-00003c.png Decorator · Decorator vs Inheritance · Low-Level Design | MASST Docs Decorator — Decorator vs Inheritance: flowchart covering Decorator composition, Inheritance hierarchy explosion, BasicClient, LoggedClient, RetryClient. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/structural/facade https://res.cloudinary.com/ddg380vsg/image/upload/v1782144156/masst-docs/lld/facade/structure-000045.png Facade · Structure · Low-Level Design | MASST Docs Facade — Structure: class diagram covering +simpleOperation, +complexOpA, +complexOpB, +complexOpC. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/structural/flyweight https://res.cloudinary.com/ddg380vsg/image/upload/v1782144162/masst-docs/lld/flyweight/intrinsic-vs-extrinsic-state-000047.png Flyweight · Intrinsic vs Extrinsic State · Low-Level Design | MASST Docs Flyweight — Intrinsic vs Extrinsic State: flowchart covering Extrinsic — per tree, Intrinsic — shared, OakSpecies texture, mesh, PineSpecies texture, mesh, Tree 1: x=10, y=20. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144171/masst-docs/lld/flyweight/structure-00003b.png Flyweight · Structure · Low-Level Design | MASST Docs Flyweight — Structure: class diagram covering <<interface>> +operation…, -intrinsicState +operation…, -pool: Map +get…, -extrinsicState. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/lld/patterns/structural/proxy https://res.cloudinary.com/ddg380vsg/image/upload/v1782144177/masst-docs/lld/proxy/structure-000023.png Proxy · Structure · Low-Level Design | MASST Docs Proxy — Structure: class diagram covering <<interface>> +request, +request, -realSubject: RealSubject +request. Part of the Low-Level Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144188/masst-docs/lld/proxy/remote-proxy-rpc-00005c.png Proxy · Remote Proxy (RPC) · Low-Level Design | MASST Docs Proxy — Remote Proxy (RPC): sequence diagram. Part of the Low-Level Design series on MASST Docs. https://docs.masst.dev/sd/observability https://res.cloudinary.com/ddg380vsg/image/upload/v1782144194/masst-docs/sd/observability/the-three-pillars-00002d.png Observability · The Three Pillars · System Design | MASST Docs Observability — Three Pillars: flowchart covering Observability, Logs…, Metrics…, Traces…. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/observability/logging https://res.cloudinary.com/ddg380vsg/image/upload/v1782144199/masst-docs/sd/logging/log-aggregation-architecture-00004b.png Logging · Log Aggregation Architecture · System Design | MASST Docs Logging — Log Aggregation Architecture: flowchart covering Service A, Service B, Service C, Log Shippers…, Message Queue…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144214/masst-docs/sd/logging/log-correlation-000070.png Logging · Log Correlation · System Design | MASST Docs Logging — Log Correlation: flowchart covering API Gateway span_id: 001, Auth Service span_id: 002, User Service span_id: 003. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/observability/monitoring https://res.cloudinary.com/ddg380vsg/image/upload/v1782144220/masst-docs/sd/monitoring-metrics/monitoring-architecture-000055.png Monitoring & Metrics · Monitoring Architecture · System Design | MASST Docs Monitoring & Metrics — Monitoring Architecture: flowchart covering Service A /metrics, Service B /metrics, Service C /metrics, Prometheus Time Series Database, Grafana…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144225/masst-docs/sd/monitoring-metrics/slis-slos-and-slas-000065.png Monitoring & Metrics · SLIs, SLOs, and SLAs · System Design | MASST Docs Monitoring & Metrics — SLIs, SLOs, and SLAs: flowchart covering SLI…, SLO…, SLA…, with consequences. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/observability/tracing https://res.cloudinary.com/ddg380vsg/image/upload/v1782144231/masst-docs/sd/distributed-tracing/why-distributed-tracing-00003d.png Distributed Tracing · Why Distributed Tracing? · System Design | MASST Docs Distributed Tracing — Why Distributed Tracing?: flowchart covering Gateway…, Service A…, Service B…, Database…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144237/masst-docs/sd/distributed-tracing/trace-structure-00001d.png Distributed Tracing · Trace Structure · System Design | MASST Docs Distributed Tracing — Trace Structure: flowchart covering Span 1: API Gateway…, Span 2: Auth Service…, Span 3: User Service…, Span 4: Cache Lookup…, Span 5: Database Query…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144243/masst-docs/sd/distributed-tracing/tracing-architecture-000017.png Distributed Tracing · Tracing Architecture · System Design | MASST Docs Distributed Tracing — Tracing Architecture: flowchart covering Service A + Trace SDK, Service B + Trace SDK, Service C + Trace SDK, Collector…, Storage…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144248/masst-docs/sd/distributed-tracing/opentelemetry-000028.png Distributed Tracing · OpenTelemetry · System Design | MASST Docs Distributed Tracing — OpenTelemetry: flowchart covering OpenTelemetry, OTLP Protocol. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/security/api-security https://res.cloudinary.com/ddg380vsg/image/upload/v1782144254/masst-docs/sd/api-security/api-security-layers-000035.png API Security · API Security Layers · System Design | MASST Docs API Security — API Security Layers: flowchart covering Transport Layer…, Network Layer…, Authentication Layer…, Authorization Layer…, Input Validation…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144264/masst-docs/sd/api-security/cors-cross-origin-resource-sharing-000029.png API Security · CORS (Cross-Origin Resource Sharing) · System Design | MASST Docs API Security — CORS (Cross-Origin Resource Sharing): sequence diagram covering Origin: https://app.com. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144270/masst-docs/sd/api-security/api-gateway-security-000077.png API Security · API Gateway Security · System Design | MASST Docs API Security — API Gateway Security: flowchart covering Service A, Service B, Service C. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144276/masst-docs/sd/api-security/secret-rotation-000024.png API Security · Secret Rotation · System Design | MASST Docs API Security — Secret Rotation: flowchart covering Old Secret…, New Secret…, Both valid during transition period, Old revoked. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/security/authentication https://res.cloudinary.com/ddg380vsg/image/upload/v1782144283/masst-docs/sd/authentication/session-based-authentication-00000f.png Authentication · Session-Based Authentication · System Design | MASST Docs Authentication — Session-Based Authentication: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144288/masst-docs/sd/authentication/jwt-flow-000031.png Authentication · JWT Flow · System Design | MASST Docs Authentication — JWT Flow: sequence diagram covering Authorization: Bearer. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144295/masst-docs/sd/authentication/authorization-code-flow-00004f.png Authentication · Authorization Code Flow · System Design | MASST Docs Authentication — Authorization Code Flow: sequence diagram covering Browser, Google. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144302/masst-docs/sd/authentication/single-sign-on-sso-000046.png Authentication · Single Sign-On (SSO) · System Design | MASST Docs Authentication — Single Sign-On (SSO): flowchart covering Identity Provider…, App A…, App B…, App C…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144308/masst-docs/sd/authentication/token-refresh-flow-000023.png Authentication · Token Refresh Flow · System Design | MASST Docs Authentication — Token Refresh Flow: sequence diagram. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/security/authorization https://res.cloudinary.com/ddg380vsg/image/upload/v1782144314/masst-docs/sd/authorization/structure-00007a.png Authorization · Structure · System Design | MASST Docs Authorization — Structure: flowchart covering User1, User2, User3, create / read / update / delete / manage_users. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144321/masst-docs/sd/authorization/hierarchical-rbac-000025.png Authorization · Hierarchical RBAC · System Design | MASST Docs Authorization — Hierarchical RBAC: flowchart covering Admin…, Manager…, Editor…, Viewer. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144326/masst-docs/sd/authorization/rebac-relationship-based-access-control-00000e.png Authorization · ReBAC (Relationship-Based Access Control) · System Design | MASST Docs Authorization — ReBAC (Relationship-Based Access Control): flowchart covering User: Alice, Document A, Document B, Folder X, User: Bob. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144331/masst-docs/sd/authorization/policy-decision-point-pdp-architecture-000068.png Authorization · Policy Decision Point (PDP) Architecture · System Design | MASST Docs Authorization — Policy Decision Point (PDP) Architecture: flowchart covering Client Request, API Gateway, Policy Enforcement Point…, Policy Admin Point…, Policy Decision Point…. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/security/encryption https://res.cloudinary.com/ddg380vsg/image/upload/v1782144337/masst-docs/sd/encryption/symmetric-encryption-000051.png Encryption · Symmetric Encryption · System Design | MASST Docs Encryption — Symmetric Encryption: flowchart covering Plaintext: Hello, Encrypt…, Ciphertext: x7k9, Decrypt…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144342/masst-docs/sd/encryption/asymmetric-encryption-000034.png Encryption · Asymmetric Encryption · System Design | MASST Docs Encryption — Asymmetric Encryption: flowchart covering Key Pair, Public Key…, Private Key…, Plaintext, Ciphertext. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144347/masst-docs/sd/encryption/data-at-rest-000037.png Encryption · Data at Rest · System Design | MASST Docs Encryption — Data at Rest: flowchart covering Application, Database Encrypted Columns…, File Storage Encrypted Files…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144353/masst-docs/sd/encryption/envelope-encryption-00003b.png Encryption · Envelope Encryption · System Design | MASST Docs Encryption — Envelope Encryption: flowchart covering Key Management Service Master Key…, Data Encryption Key…, Your Data. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144363/masst-docs/sd/encryption/data-in-transit-000070.png Encryption · Data in Transit · System Design | MASST Docs Encryption — Data in Transit: sequence diagram covering supported ciphers, chosen cipher, certificate, ECDHE. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144368/masst-docs/sd/encryption/certificate-chain-000018.png Encryption · Certificate Chain · System Design | MASST Docs Encryption — Certificate Chain: flowchart covering Root CA…, Intermediate CA, Server Cert…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144373/masst-docs/sd/encryption/mtls-mutual-tls-000068.png Encryption · mTLS (Mutual TLS) · System Design | MASST Docs Encryption — MTLS (Mutual TLS): flowchart covering Service A…, Service B…. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144379/masst-docs/sd/encryption/key-hierarchy-00005b.png Encryption · Key Hierarchy · System Design | MASST Docs Encryption — Key Hierarchy: flowchart covering Root Key…, Region KEK…, DEKs. Part of the System Design series on MASST Docs. https://docs.masst.dev/sd/system-components/db https://res.cloudinary.com/ddg380vsg/image/upload/v1782144392/masst-docs/sd/databases/database-decision-tree-conditional-flow-000021.png Databases · 🧭 Database Decision Tree (Conditional Flow) · System Design | MASST Docs Databases — 🧭 Database Decision Tree (Conditional Flow): flowchart covering Start: What is your main requirement?, Strong consistency & ACID transactions?, RDBMS PostgreSQL, MySQL… Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782077605/masst-docs/sd/databases/diagram-000069.png Databases · Diagram · System Design | MASST Docs Databases — Diagram: ER diagram covering ORDER : places ORDER ||--|{ PRODUCT : contains CUSTOMER…, id int order_date date total float, id int name string price float. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144402/masst-docs/sd/databases/diagram-00001a.png Databases · Diagram · System Design | MASST Docs Databases — Diagram: class diagram covering +set_key_value +get_key, +userId_1001 +name_Alice +age_30, +sessionId_abcd +userId_1001 +expires_10min. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144407/masst-docs/sd/databases/diagram-000062.png Databases · Diagram · System Design | MASST Docs Databases — Diagram: flowchart covering 'Document_DB', '_id_1', 'name_Alice', 'orders', '101'. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144412/masst-docs/sd/databases/diagram-00005e.png Databases · Diagram · System Design | MASST Docs Databases — Diagram: flowchart covering 'Alice', 'Bob', 'Charlie', 'Dave'. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144417/masst-docs/sd/databases/diagram-000065.png Databases · Diagram · System Design | MASST Docs Databases — Diagram: flowchart covering 'Inverted_Index', 'apple_docID_1', 'banana_docID_1', 'orange_docID_2', 'mango_docID_2'. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144422/masst-docs/sd/databases/diagram-00007e.png Databases · Diagram · System Design | MASST Docs Databases — Diagram: flowchart covering 'Vector_DB', 'Doc1', 'Doc2', 'Query_Vector'. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144428/masst-docs/sd/databases/diagram-000067.png Databases · Diagram · System Design | MASST Docs Databases — Diagram: flowchart covering 'Multi-Model_DB', 'Document_id1_name_Alice', 'Graph Alice->friend->Bob', 'KeyValue_session_abcd_userId1'. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144432/masst-docs/sd/databases/diagram-00004f.png Databases · Diagram · System Design | MASST Docs Databases — Diagram: sequence diagram. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144437/masst-docs/sd/databases/diagram-00007b.png Databases · Diagram · System Design | MASST Docs Databases — Diagram: class diagram covering +File_user_db +Tables_users_orders, +id +name. Part of the System Design series on MASST Docs. https://res.cloudinary.com/ddg380vsg/image/upload/v1782144442/masst-docs/sd/databases/diagram-000042.png Databases · Diagram · System Design | MASST Docs Databases — Diagram: flowchart covering 'Client', 'DB_Node_US', 'DB_Node_EU', 'Replicas'. Part of the System Design series on MASST Docs.