Working with default cluster objects

You can alter the default channel definitions in the same way as any other channel definition, by running MQSC or PCF commands. Do not alter the default queue definitions, except for SYSTEM.CLUSTER.HISTORY.QUEUE.

For a full list of these objects, see Default cluster objects. The following list only includes those objects that you can change.
SYSTEM.CLUSTER.HISTORY.QUEUE
Each queue manager in a cluster has a local queue called SYSTEM.CLUSTER.HISTORY.QUEUE. The SYSTEM.CLUSTER.HISTORY.QUEUE is used to store the history of cluster state information for service purposes.

In the default object settings, SYSTEM.CLUSTER.HISTORY.QUEUE is set to PUT ( ENABLED). To suppress history collection change the setting to PUT ( DISABLED).

SYSTEM.CLUSTER.TRANSMIT.QUEUE
Each queue manager has a definition for a local queue called SYSTEM.CLUSTER.TRANSMIT.QUEUE. SYSTEM.CLUSTER.TRANSMIT.QUEUE is the default transmission queue for all messages to all queues and queue managers that are within clusters. You can change the default transmission queue for each cluster-sender channel to SYSTEM.CLUSTER.TRANSMIT.ChannelName, by changing the queue manager attribute DEFXMITQ [z/OS], except on z/OS® . You cannot delete SYSTEM.CLUSTER.TRANSMIT.QUEUE. It is also used to define authorization checks whether the default transmission queue that is used is SYSTEM.CLUSTER.TRANSMIT.QUEUE or SYSTEM.CLUSTER.TRANSMIT.ChannelName.