Defining management class expiration attributes

Page 1 of the Management Class Define panel contains the management class expiration attributes. DFSMShsm processes the expiration attributes before the migration attributes that you specify on the second page of the Management Class Define panel. SCDS Name and Management Class Name are output fields that contain the SCDS and management class names you specified in the Management Class Application Selection panel. Supply these values:

Description

Is an optional field of 120 characters you can use to describe the management class.

Expiration Attributes

Determine the action for data set and object expiration and deletion. DFSMShsm deletes expired data sets during automatic space management processing. OAM deletes objects during a storage management cycle with the approval of the auto-delete installation exit. Expiration attributes are required values that indicate when a data set or object becomes eligible for expiration. You can base expiration criteria on a specific date, on the number of days since the data set or object was allocated, or on the number of days since the data set or object was last referenced.

Expire after Days Non-usage: Specifies how much time must elapse since last access before a data set or object becomes eligible for expiration. The default is NOLIMIT.
Expire after Date/Days: Specifies an absolute date or period after its allocation for a data set or object to become eligible for expiration. The default is NOLIMIT.

Retention Limit

Is a required value that limits the use of retention period (RETPD) and expiration date (EXPDT) values that are explicitly specified in JCL, are derived from management class definitions or are explicitly specified in the OSREQ STORE macro. If the value of a user-specified RETPD or EXPDT is within the limits specified in the Retention Limit field, it is saved for the data set. For objects, only RETPD is saved.

The default retention limit is NOLIMIT. If you specify zero, a user-specified or data class derived EXPDT or RETPD is ignored. If users specify values that exceed the maximum period, the retention limit value overrides not only their values but also the expiration attributes values. The retention limit value is saved. ISMF primes the Retention Limit field with what you specified the last time.