PUBLISH channel message

Available since: 2.0.0

Time complexity: O(N+M) where N is the number of clients subscribed to the receiving channel and M is the total number of subscribed patterns (by any client).

ACL categories: @pubsub @fast

Posts a message to the given channel.

In a Redis Cluster clients can publish to every node. The cluster makes sure that published messages are forwarded as needed, so clients can subscribe to any channel by connecting to any one of the nodes.


Integer reply: the number of clients that received the message. Note that in a Redis Cluster, only clients that are connected to the same node as the publishing client are included in the count.