iSeries MQ - Creating the system-default objects

Create the system-default objects

The system-default objects are created automatically when you issue the CRTMQM command to create a queue manager. For example:

CRTMQM MQMNAME(QMGRNAME) ASP(*SYSTEM)

We can refresh them using the STRMQM command. For example:

STRMQM MQMNAME(QMGRNAME) RDEFSYS(*YES)

Refer to the onscreen help for information about using this command.

on the command STRMQM MQMNAME(QMGRNAME) RDEFSYS(*YES):-

The command does not recreate the objects, it performs a CRTxxxx REPLACE(*YES) for all of the SYSTEM.* objects.
This means that it refreshes the parameters on the objects back to their defaults. So if, for example, on the SYSTEM.DEFAULT.LOCAL.QUEUE object, TRGENBL had previously been changed to *YES, then, when the command is run, it is changed back to TRGENBL(*NO).
If any messages exist on a queue, they are left intact, because the queues are not physically deleted.
The contents of the SYSTEM.AUTH.DATA.QUEUE are untouched when this command is run.
So, if the contents of this (or any other significant queue) become corrupt, it must be physically deleted and recreated either from scratch, or from a backup.