Redis Basics

Summary

An extremely fast in-memory key-value store, commonly used for caching, session storage, rate limiting and pub/sub — not typically your primary database, but a critical supporting one.

• 1Install Redis locally and practice `SET`/`GET`/`EXPIRE` in the CLI.
• 2Store a computed value in Redis with a TTL to see automatic expiration.
• 3Learn why Redis being in-memory makes it fast but requires care around persistence.