Introducing Cache Reserve: massively extending Cloudflare’s cache

What this post added

Introduced Cache Reserve, a new persistent data store implemented on top of R2, acting as an ultimate upper-tier cache. Cache Reserve ensures all cacheable content is served from Cloudflare's global cache indefinitely, complementing existing popularity-based caching (LRU) by preventing eviction of less-requested content. It reduces origin egress fees and improves response performance by minimizing origin requests. Cache Reserve respects cache-control headers and purge requests for content updates.