Explanation: SMALLDATASETPACKING and NOSMALLDATASETPACKING
are mutually exclusive, optional subparameters of the MIGRATION parameter
specifying whether small data set packing can be done on the migration
level 1 volume.
- SMALLDATASETPACKING
- specifies that small data set packing can be done on the migration
level 1 volume.
- NOSMALLDATASETPACKING
- specifies that small data set packing cannot be done on the
migration level 1 volume.
Defaults: If you are adding a migration
level 1 volume to DFSMShsm, the default is NOSMALLDATASETPACKING.
If you are changing the attributes of a volume and do not specify
either subparameter, the small data set packing status does not change.
Note: - The SMALLDATASETPACKING and NOSMALLDATASETPACKING subparameters
do not apply to the MIGRATIONLEVEL2 subparameter. If you specify the
SMALLDATASETPACKING or NOSMALLDATASETPACKING parameter when it does
not apply, DFSMShsm ignores it.
- Before small data set packing can be done on a migration level
1 volume, you must define a VSAM key-sequenced data set as the small-data-set-packing
data set on the migration level 1 volume. Refer to the z/OS DFSMShsm Implementation and Customization Guide
for details about how to allocate the small-data-set-packing data
set. In addition, the SMALLDATASETPACKING parameter must be specified
with the SETSYS command. Small-data-set-packing data sets are not
required on all migration level 1 volumes.
- The number of SDSP data sets defined must be at least equal to
the maximum number of concurrent volume migration tasks that could
be executing in your complex. Additional SDSPs are recommended for
RECALL processing and ABARS processing and if some SDSPs should become
full during migration.