Redis suggest add a option for redis-cluster(pub/sub) ,just broadcast message in the same sharding

suggest add a option for redis-cluster(pub/sub) : just broadcast message in the same sharding , instead of broadcast message around the cluster .

redis-cluster(pub/sub) message will limited by bisection bandwidth , if we create a cluster with 3/4 nodes, performance is not good , we'll create many redis-cluster, and we will manage many redis-cluster in client !

refer:

https://github.com/antirez/redis/issues/2672 https://github.com/antirez/redis/issues/122

Comment From: hpatro

It's implemented with a new set of commands ([SSUBSCRIBE/SUNSUBSCRIBE/SPUBLISH]) https://github.com/redis/redis/pull/8621

@madolson We can close this.

Comment From: madolson

Agreed