COMPACT ALL and NONE: Specifying whether to compact data sets

Explanation: ALL | NONE are mutually exclusive, optional subparameters of the COMPACT parameter specifying whether or not to compact a data set during migration or backup.

Subparameter Explanation
ALL DFSMShsm can compact a data set during migration to DASD, migration to tape, backup to tape, and backup to DASD.
NONE DFSMShsm does not compact a data set during migration or backup.

SMS relationship: Parameter differs in meaning when applied to SMS-managed or non-SMS-managed DASD volumes or data sets.

SETSYS default: None.

DFSMShsm default: If you do not specify any subparameter of the COMPACT parameter on any SETSYS command, the DFSMShsm default is NONE.
Note:
  1. When you specify the ALL or NONE subparameter with the COMPACT parameter, DFSMShsm ignores all other subparameters.
  2. DFSMShsm compacts cataloged and uncataloged data sets.
Parent topic: Optional parameters of the SETSYS command