Redis cache replicas support

[oskrabanek]

Proposal

I would like to have an option of using Redis cache in replicas mode so that Master can be used for writing only and Replicas for reading the data.

Use-Case

1. While executing the cache-lookup policy the data are not in the cache
2. The data are stored using master
3. Another request arrives
4. As the cache-lookup policy is executed the data are read from replica

Anything else?

No response