Introducing Cache Reserve: massively extending Cloudflare’s cache

Cloudflare has introduced Cache Reserve, a new feature that allows customers to persistently serve all static content from its global cache. This helps achieve higher cache hit ratios and lower egress bills. Cache Reserve removes customer content from popularity contests and ensures that less-popular content can still be served from Cloudflare's cache, saving costs on origin egress fees. The feature works by backstopping all cacheable content in a large, persistent data store implemented on top of R2. It provides guaranteed SLAs for how long content can remain in cache and extends the benefits of Tiered Cache by reducing the number of times Cloudflare's network needs to ask an origin for content. Currently, Cache Reserve is in closed beta with plans to roll it out to customers over the coming weeks.