Available since
Time complexity
O(N) where N is the number of channels to subscribe to.
ACL categories
@pubsub, @slow

Subscribes the client to the specified channels.

Once the client enters the subscribed state it is not supposed to issue any other commands, except for additional SUBSCRIBE, SSUBSCRIBE, PSUBSCRIBE, UNSUBSCRIBE, SUNSUBSCRIBE, PUNSUBSCRIBE, PING, RESET and QUIT commands. However, if RESP3 is used (see HELLO) it is possible for a client to issue any commands while in subscribed state.

For more information, see Pub/sub.

Behavior change history #

  • >= 6.2.0: RESET can be called to exit subscribed state.

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