After you have installed WebSphere MQ, it is defined as a formal z/OS subsystem. This message appears during any initial program load (IPL) of z/OS:
CSQ3110I +CSQ1 CSQ3UR00 - SUBSYSTEM ssnm INITIALIZATION COMPLETE
where ssnm is the WebSphere MQ subsystem name.
From now on, you can start the queue manager for that subsystem from any z/OS console that has been authorized to issue system control commands; that is, a z/OS SYS command group. You must issue the START command from the authorized console, you cannot issue it through JES or TSO.
If you are using queue-sharing groups, you must start RRS first, and then DB2(R), before you start the queue manager.
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