System Design Cheat Sheet

System Design Cheatsheet. System Design.md. System Design Cheatsheet. Picking the right architecture = Picking the right battles +

| Model | Behavior | Latency | Data loss risk | |-------|----------|---------|----------------| | | All reads see latest write | Higher | None (if quorum) | | Eventual | Reads may be stale, converge over time | Lower | Possible during failover | | Read-your-writes | Session sees own writes | Medium | None | | Monotonic reads | Reads never go back in time | Medium | None | system design cheat sheet

Start with relational. Scale with read replicas → cache → sharding → NoSQL when needed. System Design Cheatsheet

Stale data, thundering herd, cache stampede. system design cheat sheet