There are four DFSMS features:
- DFSMSdss
- DFSMSdss is
a DASD data and space management tool. DFSMSdss can be used to copy and move data
sets between volumes; dump and restore data sets, entire volumes,
or tracks; convert data sets and volumes to and from SMS management;
compress partitioned data sets; release unused space in data sets;
and consolidate free space and data sets on volumes.
- DFSMShsm
- DFSMShsm is
a DASD storage management and productivity tool for managing low-activity
and inactive data. It improves DASD use by automatically managing
space and data availability in a storage hierarchy. Working with SMS, DFSMShsm performs
space management and availability management of data sets as directed
by their management class attributes.
- DFSMSrmm
- DFSMSrmm allows
you to manage your removable media as one enterprise-wide library
across systems. DFSMSrmm manages
your installation's tape volumes and the data sets on those volumes. DFSMSrmm manages
all tape media, such as cartridge system tapes and 3420 reels, as
well as other removable media you define to it. For example, DFSMSrmm can
record the shelf location for optical disks and track their vital
record status; it does not manage the objects on optical disks.
- DFSMStvs
- DFSMS Transactional VSAM Services, an optional feature, enables
running batch jobs concurrently with CICS® online
transactions to allow updates to the shared VSAM data sets. Multiple
batch jobs and online transactions can be run against the same VSAM
data sets. DFSMStvs ensures data integrity for concurrent batch updates
while CICS provides it for
online updates.