class DeprecatedRedisCacheStore

Deprecated Redis Cache Store

Deployment note: Take care to use a dedicated Redis cache rather than pointing this at a persistent Redis server (for example, one used as an Active Job queue). Redis won’t cope well with mixed usage patterns and it won’t expire cache entries by default.

Redis cache server setup guide: redis.io/topics/lru-cache

• Supports vanilla Redis, hiredis, and Redis::Distributed.

• Supports Memcached-like sharding across Redises with Redis::Distributed.

• Fault tolerant. If the Redis server is unavailable, no exceptions are raised. Cache fetches are all misses and writes are dropped.

• Local cache. Hot in-memory primary cache within block/middleware scope.

• read_multi and write_multi support for Redis mget/mset. Use Redis::Distributed 4.0.1+ for distributed mget support.

• delete_matched support for Redis KEYS globs.

• read supports delete: true to atomically read and delete a cache entry using the Redis GETDEL command.

  cache.write("greeting", "hello")
  cache.read("greeting", delete: true)  # => "hello"
  cache.read("greeting")                 # => nil