z/OS DFSMS OAM Planning, Installation, and Storage Administration Guide for Object Support
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Maintaining management class definitions

z/OS DFSMS OAM Planning, Installation, and Storage Administration Guide for Object Support
SC23-6866-00

When the need for a new object cycle is recognized, it usually leads to the definition of a new set of management classes for the phases in the new cycle. It becomes necessary to add statements to the ACS routine to process the transitions for the new management classes.

Consider the effect of the changed management class definitions on objects that currently exist. The change of a management class might imply conversion action which is not supported by OSMC. For example, a transition rule could be changed to cause the schedule date to occur a month earlier. OSMC would not process the object until the scheduled date assigned using the previous transition rule, which is a month later than is specified by the updated definition.

Management class definitions might be changed to accomplish the following functions:
  • Add management classes.
  • Alter backup requirements.
  • Change retention criteria.
  • Modify class transition parameters.

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