This post is a FAQ for Redis, when users don’t see the data they stored in Redis.
As per the Redis project, Redis is described as an in-memory data structure store. If you are using Redis as an LRU cache, you can see following recommendation from the Redis docs: Using Redis as an LRU cache
Lately, I have received multiple questions about when Redis will lose data. This data loss can be as simple as a few keys disappearing unexpectedly or complete loss of all data in Redis. Below I will talk about the most common causes as well as a few rare cases where this can happen.
Note: These scenarios are common to all Redis hosting environments, including self-hosting Redis in your own data center.