Space utilization and capacity planning

You can collect information on active and inactive data set space utilization and capacity planning by using the ISMF Data Collection application to produce a DCOLLECT job. DCOLLECT provides measurement data in a sequential data set (also called a flat file), which can be used as input to the DFSMSrmm Report Generator for creating customized reports and to other applications such as billing and report formatting.

You can use it to produce measurement data on: active data sets, which are data sets that have not been backed up or migrated; inactive data sets, which are data sets that have been backed up or migrated; capacity planning, which concerns volume capacity and usage; and volumes. Information can be obtained on the following:

Active data sets
Volumes
Migrated data sets (DFSMShsm)
Backup data sets (DFSMShsm)
DASD capacity planning (DFSMShsm)
Tape capacity planning (DFSMShsm)

DCOLLECT is an access method services function.