PUBSUB SHARDCHANNELS [pattern]

Available since: 7.0.0

Time complexity: O(N) where N is the number of active shard channels, and assuming constant time pattern matching (relatively short channels).

ACL categories: @pubsub @slow

Lists the currently active shard channels.

An active shard channel is a Pub/Sub shard channel with one or more subscribers.

If no pattern is specified, all the channels are listed, otherwise if pattern is specified only channels matching the specified glob-style pattern are listed.

The information returned about the active shard channels are at the shard level and not at the cluster level.

@return

@array-reply: a list of active channels, optionally matching the specified pattern.

@examples

> PUBSUB SHARDCHANNELS
1) "orders"
PUBSUB SHARDCHANNELS o*
1) "orders"