redis

Scope

Covers Redis the server and the code that talks to it: structure selection and the encodings behind it, key naming, expiry and eviction, persistence and replication, transactions and scripting, locks, Pub/Sub and Streams, Cluster, connections and pipelining, the cache patterns that keep a database alive, the Redis Query Engine including vector search and semantic caching, ACLs, and the commands that answer "what is this instance doing right now".

The body is written against Redis 8.10 (current stable; 8.10.1 at time of writing, with 8.8.x, 8.6.x, 8.4.x, 8.2.x, 7.4.x, 7.2.x and 6.2.x still maintained). Rules that need a server newer than 7.2 carry a gate such as (7.4+). Confidence markers: [verified] measured here against 8.10.1, [official] from Redis documentation, [community] otherwise.

Not covered: