Comparison with distributed queuing
If you do not use clusters, your queue managers are independent and communicate using distributed queuing. If one queue manager needs to send messages to another it must have defined:
- A transmission queue
- A channel to the remote queue manager
If you group queue managers in a cluster, the queue managers can make the queues that they host available to every other queue manager in the cluster. Any queue manager can send a message to any other queue manager in the same cluster without explicit channel definitions, remote-queue definitions, or transmission queues for each destination. Every queue manager in a cluster has a single transmission queue from which it can transmit messages to any other queue manager in the cluster. Each queue manager in a cluster needs to define only:
- One cluster-receiver channel on which to receive messages
- One cluster-sender channel with which it introduces itself and learns about the cluster
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