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ENQUEUE RESERVE

To ensure FDS integrity when run in a multiple CPU environment, a RESERVE is done against the volume containing the data set. This RESERVE is done for the duration of the step. For this reason, it can be desirable to schedule the run during low-activity times. Also consider placing the data set on a volume that will not be in use by other CPUs during this activity.

For more information, see the sysparm description for IXMQTIME0000 in the Systems Guide.

Note: You can override this RESERVE by specifying sysparm RSUPPRES, described in RSUPPRESn in the Systems Guide. However, caution should be taken to ensure that a cross system enqueue package is active, especially if the data set resides on a shared DASD.