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Building Blocks5

Caching
Databases — SQL vs NoSQL
Message Queues & Async Processing
API Design & Communication
CDNs, Blob Storage & Search

Distributed Patterns4

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Building Blocks5

Caching
Databases — SQL vs NoSQL
Message Queues & Async Processing
API Design & Communication
CDNs, Blob Storage & Search

Distributed Patterns4

Learn System Design Building Blocks

Contribute, invite only

Caching

Keep hot data close to the reader, and handle the two hard parts — invalidation and eviction.

10 min readUpdated 2026-09-01system-designcachingperformance