System Design Patterns Cheat Sheet: From Failure Handling to Caching
goyalshaliniuk · x · 2026-08-20
A simplified guide to essential system design patterns for building reliable, scalable systems:
- Failure Handling: Circuit Breaker (stops cascading failures), Retry Pattern, Timeout Pattern.
- Traffic Control: Rate Limiter (prevents overload), Bulkhead (isolates failures).
- Caching: Cache Aside (lazy loading), Write-Through Cache (consistency).
- Messaging: Publish-Subscribe (async comms), Event Sourcing (state via logs).
- Architecture: CQRS (read/write split), Strangler Fig (legacy replacement), Saga Pattern (distributed transactions).
Mastering these provides a strong edge in interviews and real-world engineering.
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