ONDEMANDMIGRATION: Specifying whether on-demand migration should be performed

Explanation: ONDEMANDMIGRATION is an optional parameter specifying whether on-demand migration should be performed on SMS-managed volumes that have exceeded the high threshold and that belong to a storage group defined using AM=Y (Auto Migrate, yes). This parameter can be abbreviated as ODM.

The following parameters are optional parameters of the ONDEMANDMIGRATION parameter:

N: (no) On-demand migration is not performed.
Y: (yes) On-demand migration is performed on eligible SMS-managed volumes.

For more information about on-demand migration, see Using on-demand migration.

SMS relationship: The ONDEMANDMIGRATION parameter applies to SMS-managed volumes only. It is ignored for non-SMS-managed volumes. For non-SMS managed volumes, interval migration is performed instead (if enabled).

SETSYS default: If you specify the ONDEMANDMIGRATION parameter without N (no) or Y (yes), then the SETSYS default for this parameter is N (on-demand migration is not performed).

DFSMShsm default: If you do not specify ONDEMANDMIGRATION on the SETSYS command during startup, the default is to perform interval migration.

Notes:

On-demand migration is performed on a volume when an SMS ENF72 signal is received (indicating the volume has exceeded the high threshold).
If you want to perform on-demand migration on TMM storage groups, you must convert AM=I (Auto Migrate, interval) TMM storage groups to AM=Y.
On-demand migration is paused when interval migration or primary space management are started on the same DFSMShsm host performing on-demand migration. On-demand migration will start again after interval migration or primary space management has ended, if there are eligible volumes to be processed.