COMMANDMIGRATION, MIGRATION, and NOMIGRATION: Specifying the way space management is controlled

Explanation

COMMANDMIGRATION, MIGRATION, and NOMIGRATION are mutually exclusive, optional parameters specifying how space management is controlled for a data set, a group of data sets, or all data sets on a volume.
COMMANDMIGRATION
valid only with the LEVEL parameter, specifies that DFSMShsm allows space management by data set command for any of a group of data sets you identified with the LEVEL parameter. DFSMShsm does not manage these data sets when it processes a volume.
MIGRATION
specifies that DFSMShsm will do space management automatically or by command for a data set, a group of data sets, or all data sets on a volume. You specify the MIGRATION parameter only if you previously specified the COMMANDMIGRATION or NOMIGRATION parameter with the SETMIG command.
NOMIGRATION
specifies that DFSMShsm will not do space management for the data set, group of data sets, or the volume; however, DFSMShsm will do space management by data set command for data sets when this parameter is specified with the VOLUME parameter. If NOMIGRATION is specified with the data set name or LEVEL parameter, DFSMShsm will not do space management by data set command.

Defaults

None.

Usage notes:
  1. The COMMANDMIGRATION parameter applies only when you specify the LEVEL parameter. If you specify COMMANDMIGRATION when it does not apply, DFSMShsm ignores it.
  2. If a data set is specified in more than one LEVEL parameter, that data set is given the space management status that is specified in the first issued command. For example, if LEVEL(A) COMMANDMIGRATION is specified, then LEVEL(A.B) MIGRATION is specified; because LEVEL(A) covers all A.B data sets, the second command is ignored.