SSUBSCRIBE shardchannel [shardchannel ...]

Available since: 7.0.0

Time complexity: O(N) where N is the number of shard channels to subscribe to.

ACL categories: @pubsub @slow

Subscribes the client to the specified shard channels.

In a Redis cluster, shard channels are assigned to slots by the same algorithm used to assign keys to slots. Client(s) can subscribe to a node covering a slot (primary/replica) to receive the messages published. All the specified shard channels needs to belong to a single slot to subscribe in a given SSUBSCRIBE call, A client can subscribe to channels across different slots over separate SSUBSCRIBE call.

For more information about sharded Pub/Sub, see Sharded Pub/Sub.


> ssubscribe orders
Reading messages... (press Ctrl-C to quit)
1) "ssubscribe"
2) "orders"
3) (integer) 1
1) "smessage"
2) "orders"
3) "hello"