Does Redis Cluster support multiple databases?

[Gleb Chermennov]

Hello. 

We're evaluating a use of Redis Cluster for our app. We have a prod cluster set up and working and like to clarify some things.

A colleague said that we can use db number 4 because 0 through 3 are already taken. I'm a little confused, because cluster spec says that Cluster only support one db.

Can someone clarify that? Cluster is running Redis version 3.2.x

[Jan-Erik Rediger]

The spec is right:

> Redis Cluster does not support multiple databases like the stand alone
> version of Redis. There is just database 0 and the SELECT command is
> not allowed.

The actual Redis Cluster implementation doesn't support it.

However, there might be other "clusters" of Redis to run (which then
don't use what is called Redis Cluster, but maybe just replicated
instances with some other external failover handling or sharding proxy
in front)

On Mon, Sep 04, 2017 at 01:23:44AM -0700, Gleb Chermennov wrote:
> Hello.
> We're evaluating a use of Redis Cluster for our app. We have a prod cluster
> set up and working and like to clarify some things.
> A colleague said that we can use db number 4 because 0 through 3 are
> already taken. I'm a little confused, because cluster spec

> <https://redis.io/topics/cluster-spec> says that Cluster only support one

> db.
> Can someone clarify that? Cluster is running Redis version 3.2.x
>

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