Redis: What It Actually Is and Why It's Everywhere

Logosofia no Dia a Dia · Jul 31, 2026 · 27m

Redis is the invisible backbone of modern web applications — the in-memory data structure server that powers caching, queues, leaderboards, and real-time features across the internet. But what actually is it, and why did it become the default answer for performance problems? In this episode, we trace Redis from its origin as a single C file written by an Italian startup founder in 2009 to its status as the industry standard. We break down how it differs from PostgreSQL and MongoDB, why RAM gives it a thousand-to-one speed advantage, the trade-offs of in-memory storage (cost, capacity…