CODEWITHSUNDEEP
redis
nadermx
nadermx

Reputation: 2776

Redis LRU as well as having keys expire individually?

I currently have Redis as a LRU cache. I want to keep this, but I also have some things I'm going to store in cache that are called often but are only valid for small amounts of time.

Can I use both?

So if I don't put a expiry on some keys, they will be evicted via the LRU algorithm, but will keys I set a expire on expire individually? Or do I have to deploy another redis database?

Upvotes: 0

Views: 537

Answers (1)

Itamar Haber
Itamar Haber

Reputation: 49962

No - you'll want to separate these to two independent instances, which is a good choice regardless.

Redis' eviction policy is determined by the maxmemory-policy configuration directive. It has two main "flavors" - all keys or volatile (i.e. with TTL) only. Since there is no eviction flavor for non-volatile keys only, you'll need to keep the current LRU cache instance with its all-* eviction policy and have another instance with maxmemory-policy=none for your TTLed keys.

Upvotes: 1

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