WebSphere MQ can now handle large messages up to 100 MB on shared queues. A new CFLEVEL(4) has been introduced to support this function. A prerequisite for this is DB2 7.1 or later with the fix for APAR PQ71179 is also required.
If you are using queue-sharing groups and the administration structure fails, the queue managers that are active in the queue-sharing group no longer terminate. Instead, work is suspended, the structure is automatically reallocated and rebuilt, and then the work continues.
For more information about what happens when an administration structure fails, see WebSphere MQ for z/OS Concepts and Planning Guide.
Before attempting to remove a queue manager from a queue sharing group, it is necessary to check whether the queue manager has an interest in a CF structure backup. This information can now be viewed using the DISPLAY CFSTATUS command.
A new VERIFY QSG function has been added to CSQ5PQSG, the queue-sharing group utility. You can use the VERIFY QSG function to validate the consistency of the DB2 object definitions for queue managers, structures, and shared queues.
For information about CSQ5PQSG, see WebSphere MQ for z/OS System Administration Guide.
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