Explanation: OVERFLOW and NOOVERFLOW are
mutually exclusive optional subparameters of the MIGRATION parameter
that you use to specify how a level 1 volume is considered during
selection for placement of a data set migration or backup version.
- OVERFLOW
- specifies that the volume is considered if either of the following
are true:
- The data you are migrating or backing up is larger than a given
size, as specified on the SETSYS ML1OVERFLOW(DATASETSIZE(dssize))
command.
- DFSMShsm cannot allocate enough space on a NOOVERFLOW volume.
- NOOVERFLOW
- specifies that the volume is considered with other level 1 volumes
for migration data and backup versions of any size.
Defaults: If you are adding a migration volume
to DFSMShsm, the default is NOOVERFLOW. If you are changing the attributes
of a volume and do not specify either subparameter, the overflow attribute
is not changed.
Note: The OVERFLOW and NOOVERFLOW subparameters
do not apply to the MIGRATIONLEVEL2 parameter. If you specify the
OVERFLOW or NOOVERFLOW subparameter when it does not apply, DFSMShsm
ignores it.