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Cluster channels

 

The WebSphere MQ Intercommunications book describes how message channels are used in distributed queuing. Within clusters, messages are distributed between cluster queue managers on a special type of channel for which we need cluster-receiver channel definitions and cluster-sender channel definitions.

A cluster-receiver channel definition defines a channel on which a queue manager can receive messages. A queue manager’s CLUSRCVR definition enables other queue managers to auto-define their corresponding CLUSSDR channel definitions to that queue manager. First each queue manager must manually define a cluster-sender channel. This definition enables the queue manager to make its initial contact with the cluster. It names the full repository queue manager to which the queue manager preferentially chooses to send cluster information.

The CLUSSDR definitions made on the full repository queue managers are special. All the updates exchanged by the full repositories flow exclusively on these channels. The administrator controls the network of full repositories explicitly. The administrator must make the CLUSSDR definitions on full repository queue managers manually and not leave them to be auto-defined.

 

Parent topic:

Components of a cluster

qc10740_

 

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