Cache Layer Architecture: A Practical Guide to Speed & Scale

This post provides a practical guide to cache layer architecture, detailing common caching patterns (cache-aside, read-through, write-through, write-behind, write-around), their trade-offs, and failure modes (cache stampede, hot key, invalidation, avalanche). It also discusses scaling strategies across nodes and regions, and positions Redis as a suitable solution for high-performance caching, including its capabilities for vector search and semantic caching.