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.