The DEFINE command allows you to specify the following control
structures that are used by DFSMShsm:
- Backup cycle, start date for the backup cycle, and the number
of daily backup volumes to be used for each day in the backup cycle
- Dump class attributes
- Dump cycle and start date for the dump cycle
- Automatic primary space management cycle
- Automatic secondary space management cycle
- Key ranges for DASD migration level 2 volumes
- Pool of volumes to which non-SMS-managed data sets with the same
set of initial characters are recalled
- Pool of volumes, that together can be used as a target for recalling
a data set migrated from one of the volumes
- Pool of volumes to which backed-up aggregated data sets will be
restored during aggregate recovery
- When to release a data set backup tape that is mounted to process
data set backup commands and the status of the released tape.
When you use JES3, you must use the ADDVOL command to add primary
volumes to DFSMShsm before you can specify the volumes with the POOL
or the VOLUMEPOOL parameter of the DEFINE command.
If an SMS-managed volume is specified as part of a data set pool,
a message is issued indicating that the volume has not been added
to the data set pool. Processing continues for the DEFINE command.
If, however, only SMS-managed volumes are specified for the definition
of the data set pool, the data set pool definition is rejected, and
the DEFINE command fails.
With the exception of the ARPOOL, POOL and VOLUMEPOOL parameters,
you do not have to redefine any optional parameters each time you
start DFSMShsm.