Database Engineering

Redis

Not "a cache": strings, hashes, lists, sets, sorted sets, streams, TTL, pub/sub, atomic operations — and when not to use it.

See how this works internally:LSM Trees →

Redis: Data Structures, Not a Cache

▶ interactive

Redis is an in-memory server of data structures — strings, hashes, lists, sets, sorted sets, streams — with atomic operations and per-key expiry; caching is the most common use, not the defining one.