One post tagged with "Caching"

Posts on CDNs, eviction policies, and the caching strategies that make systems faster and cheaper to run at scale.

What Is a CDN? A Simple Explanation

August 10, 2026 · 4 min read

Free system design course

Most caching is about skipping work — a database query, a computation. A CDN caches something different: distance itself, the physical time it takes a signal to travel across the planet.