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Asked: 2026-06-13T03:51:22+00:00

If two separate clients do a PUBLISH on the same channel, can I assume

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If two separate clients do a PUBLISH on the same channel, can I assume that the order in which the subscribers will be informed will be respected ?

  • ALL subscribers receive the fist PUBLISH msg
  • then ALL sunbscribers receive the second ?

Since redis is singlethreaded it should but I want to make sure it does not process both PUBLISH in parallel.

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1 Answer

  1. Editorial Team

    Yes, PUBLISH is a synchronous command. It does not return until it pushes the message to all subscribers. And different PUBLISH commands are naturally serialized in Redis request queue.

    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).

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