Caching

Lessons in this group, roughly in build order:

• where-to-cache-client-cdn-web-server-database-application — A cache is any layer that serves a saved copy so work isn’t repeated — and you can place one at every hop…
• caching-strategies-cache-aside-write-through-write-behind-refresh-ahead — A caching strategy is the protocol that decides who reads and writes the cache versus the store, and it…
• eviction-policies-cache-pitfalls — An eviction policy is the rule a cache uses to decide which entry to discard when memory fills — and the…