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Cataloging Generation Data Groups z/OS DFSMS Using Data Sets SC23-6855-00 |
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Also, in a multiple-step job, you should catalog or uncatalog data sets using JCL rather than IEHPROGM or a user program. Because data set allocation and unallocation monitors data sets during job execution and is not aware of the functions performed by IEHPROGM or user programs, data set orientation might be lost or conflicting functions might be performed in subsequent job steps. When you use a relative generation number to refer to a generation
that was previously cataloged, the relative number has the following
meaning:
When cataloging is requested using JCL, all actual cataloging occurs
at step termination, but the relative generation number remains the
same throughout the job. The following results can occur:
For example, if the next steps contained the following relative
generation numbers:
You must change A.B.C(+1) to A.B.C(0), A.B.C(0) to A.B.C(-1), and A.B.C(-1) to A.B.C(-2) before restarting the step. |
Copyright IBM Corporation 1990, 2014
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