Redis publish/subscribe: see what channels are currently subscribed to

Question

I am currently interested in seeing what channels are subscribed to in a Redis pub/sub application I have. When a client connects to our server, we register them to a channel th

Answer 1

As of Redis 2.8 you can do:

PUBSUB CHANNELS [pattern]

The PUBSUB CHANNELS command has O(N) complexity, where N is the number of active channels.

So in your case:

redis-cli PUBSUB CHANNELS user*

would give you want you want.