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Replying to a queue manager outside the cluster

 

To form a return path for replies, the gateway (QM1) advertises a queue-manager alias for the queue manager outside the cluster. It advertises this alias to the whole cluster by adding the cluster attribute to its queue-manager alias definition. (Remember that a queue-manager alias definition is like a remote queue definition, but with a blank RNAME.) For example:

DEFINE QREMOTE(QM3) RNAME(' ') RQMNAME(QM3) CLUSTER(DEMO)

Again, because QM3 is not part of a cluster, it must communicate using distributed queuing techniques. Therefore, QM1 must also have a sender channel and a transmission queue to QM3. QM3 needs a corresponding receiver channel. The channels and transmission queues are not shown explicitly in Figure 1.

When the application (app2) on QM2 issues an MQPUT call to send a reply to Q3 at QM3, the reply is sent to the gateway, which uses its queue-manager alias to resolve the destination-queue and queue-manager name.

You may define more than one route out of a cluster.

 

Parent topic:

Examples of using aliases within clusters

qc10840_

 

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