🔧 Redis Complete Guide: Caching, Queues & Pub/Sub (2026)

Redis is a data structure server that lives in memory. It's fast because reads and writes never touch a disk during normal operation. It's versatile because it supports more than just key-value pairs — strings, hashes, sorted sets, lists, streams, and pub/sub channels are all first-class primitives.

Most developers use Redis as a cache. That's a...