Glossary term
What is Redis? Meaning for developers
In DevOps
Very fast in-memory key-value store, used for sessions, caching and rate limiting.
Learn it properly · DevOpsLesson 16: Redis: Caching and SessionsFast in-memory storage for sessions, rate limits and hot data — and when not to reach for it.In System Design
An in-memory data store: cache, counters, sessions, queues. Example: Storing sessions and rate-limit counters.
Learn it properly · System DesignLesson 15: Caching Part 1: Where to Cache and WhyWhy ask the database the same question 10,000 times a second? What caches are, why they work so well, every layer you can cache at — browser to buffer pool — what to cache, and how Redis and Memcached compare.