When GDIF or GTAF is running, we strongly recommend that you stop CA MIM on all systems rather than on a subset of the systems in your complex. To do this, issue a z/OS STOP or the CA MIM SHUTDOWN command. To use the z/OS STOP command, specify the name of the CA MIM started task as a parameter. For example, if MIMGR is the name of the started task that you want to stop, then issue this shortened form of the z/OS STOP command:
P MIMGR
CA MIM then issues message MIM0060, which asks what type of processing you want to perform at termination. Reply GLOBAL to stop on all systems and to have CA MIM quiesce on all systems at termination.
You can also use the SHUTDOWN GLOBAL command to stop CA MIM on all systems. For example, issue this SHUTDOWN command from any system:
SHUTDOWN GLOBAL
Note: GLOBAL is the initial default value of the command. You can change the default value of the command to DUMP, FREE, LOCAL, or RESERVE with the SETOPTION SHUTDOWN command.
Note: For a description of the SHUTDOWN command, see the Statement and Command Reference Guide.
When GLOBAL is selected, CA MIM does not stop with an abend code or request an abend dump.
Although GDIF does not propagate any new ENQ or RESERVE requests or eliminate new hardware reserves, GDIF does not terminate while a propagated or converted request is outstanding. GDIF does terminate only after tasks have issued DEQ requests to release these resources. This ensures resource integrity.
GTAF takes offline any device that is not allocated on each local system. This ensures integrity of tape resources. After GTAF terminates, each managed tape device is left online to, at most, one system in the complex.
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