I'm looking for a pub/sub engine, with the following requirements:

  1. Very low latency < 0.5 sec
  2. Scalable
  3. Shardable (based on geo localisation)

I'd like to be able to have multiple pub/sub servers and be able to publish or subscribe to channels from any server, no matter on which server the channel is declared.

For example:

If user A is connected to server SRV1 and user B connected to server SRV2, If user B subscribe to "MyChannel" and user A publish something on channel "MyChannel", user B will get the message even if he's not connected to the same server.

I don't know if Redis is able to do that. I didn't find anything about the subject.

scalability real-time redis publish-subscribe sharding
Edit
Report