IBM OS/390 User Manual
functional components as well as RACF and DFSORT. For details, see section 1.3
in the
in the
DFSMS/MVS General Information, GC26-4900.
•
DFSMSdfp is an OS/390 base element and functional component of
DFSMS/MVS. It provides the storage, program, data, and device
management functions of MVS. DFSMSdfp provides the foundation for
distributed data access, using the Distributed File Manager to support
remote access of MVS data and storage resources from workstations,
personal computers, or other authorized systems in an SNA LU 6.2 network.
DFSMSdfp also provides the Storage Management Subsystem component.
DFSMSdfp is the DFSMS component that provides OS/390
DFSMS/MVS. It provides the storage, program, data, and device
management functions of MVS. DFSMSdfp provides the foundation for
distributed data access, using the Distributed File Manager to support
remote access of MVS data and storage resources from workstations,
personal computers, or other authorized systems in an SNA LU 6.2 network.
DFSMSdfp also provides the Storage Management Subsystem component.
DFSMSdfp is the DFSMS component that provides OS/390
′
s VSAM functions.
•
DFSMSdss is an OS/390 optional feature and functional component of
DFSMS/MVS. It is used for data movement and replication, space
management (defragmentation), data backup and recovery, and data set and
volume conversion to system managed storage.
DFSMS/MVS. It is used for data movement and replication, space
management (defragmentation), data backup and recovery, and data set and
volume conversion to system managed storage.
•
DFSMShsm is an OS/390 optional feature and functional component of
DFSMS/MVS. It provides the functions for:
DFSMS/MVS. It provides the functions for:
−
Storage management using a hierarchy of storage devices in its
automatic management of data, relieving end-users from manual storage
tasks.
automatic management of data, relieving end-users from manual storage
tasks.
−
Space management by keeping only active data on fast-access storage
devices. It automatically frees space on user volumes by deleting eligible
data sets, releasing over-allocated space, and moving low-activity data to
lower-cost-per-byte devices.
devices. It automatically frees space on user volumes by deleting eligible
data sets, releasing over-allocated space, and moving low-activity data to
lower-cost-per-byte devices.
−
Tape mount management by writing multiple output data sets to a single
tape, making it a useful tool for implementing tape mount management
(TMM) under SMS. For more information on TMM, refer to
tape, making it a useful tool for implementing tape mount management
(TMM) under SMS. For more information on TMM, refer to
Implementing
System-Managed Storage, SC26-3123.
−
Availability management by backing up your data, either automatically or
by command, to ensure availability in the event of accidental loss of data
sets or physical loss of volumes. Disaster backup and recovery is also
provided for user-defined groups of data sets (aggregates), so that
critical applications can be restored at the same location or at an off-site
location. This capability is referred to as ABARS.
by command, to ensure availability in the event of accidental loss of data
sets or physical loss of volumes. Disaster backup and recovery is also
provided for user-defined groups of data sets (aggregates), so that
critical applications can be restored at the same location or at an off-site
location. This capability is referred to as ABARS.
•
DFSMSrmm is an OS/390 optional feature and functional component of
DFSMS/MVS. It provides the management functions for removable media,
including tape cartridges and reels. DFSMSrmm can be used to manage
system-managed tape libraries such as the 3494 or 3495 Automated Tape
Library Dataservers or the manual 3495 Tape Library Dataserver Model M10.
DFSMSrmm can also manage non-system-managed tape libraries.
DFSMS/MVS. It provides the management functions for removable media,
including tape cartridges and reels. DFSMSrmm can be used to manage
system-managed tape libraries such as the 3494 or 3495 Automated Tape
Library Dataservers or the manual 3495 Tape Library Dataserver Model M10.
DFSMSrmm can also manage non-system-managed tape libraries.
•
DFSORT is an OS/390 optional feature. It sorts, merges and copies data sets,
and also helps you to analyze data and produce detailed reports using the
ICETOOL utility or the OUTFIL function.
and also helps you to analyze data and produce detailed reports using the
ICETOOL utility or the OUTFIL function.
•
RACF is an OS/390 optional feature. It controls access to data and other
resources in MVS.
resources in MVS.
Chapter 5. Disk and Tape Storage Considerations
101