DFSMSdfp

Storage management

DFSMSdfp includes Interactive Storage Management Facility (ISMF), which lets you define and maintain policies to manage your storage resources. These policies help to improve the usage of storage devices and to increase levels of service for user data, with minimal effort required from users. Storage Management Subsystem (SMS) uses these policies to manage storage for the operating system. More specifically, the storage administrator uses SMS to define data classes, storage classes, management classes, storage groups, aggregate groups, copy pools, and automatic class selection routines. You can also use the NaviQuest tool under ISMF to migrate to SMS, maintain your SMS configuration, and perform testing, implementation, and reporting tasks in batch.

Tape mount management

Tape mount management is a methodology for improving tape usage and reducing tape costs. This methodology involves intercepting selected tape data set allocations through the SMS automatic class selection (ACS) routines and redirecting them to a direct access storage device (DASD) buffer. Once on DASD, you can migrate these data sets to a single tape or small set of tapes, thereby reducing the overhead associated with multiple tape mounts.

Data management

DFSMSdfp helps you store and catalog information on DASD, optical, and tape devices so that it can be quickly identified and retrieved from the system. DFSMSdfp provides access to both record- and stream-oriented data in the z/OS® environment.

Device management

DFSMSdfp can be used when you define your input and output (I/O) devices to the system and in controlling those devices in the z/OS environment.

Distributed data access

Distributed data access allows all authorized systems and users in a network to use system-managed storage or automated storage management.DFSMSdfp uses the Distributed FileManager/MVS (DFM) or the z/OS Network File System to enable remote clients in a network to access data and storage resources on z/OS systems.

z/OS UNIX® System Services (z/OS UNIX) provides the command interface that interactive UNIX users can use. z/OS UNIX allows z/OS programs to directly access UNIX data.

Advanced copy services

Advanced Copy Services includes remote and point-in-time copy functions that provide backup and recovery of data. When used before a disaster occurs, Advanced Copy Services provides rapid backup of critical data with minimal impact to business applications. If a disaster occurs to your data center, Advanced Copy Services provides rapid recovery of critical data.

Object access method

Object access method (OAM) provides storage, retrieval, and storage hierarchy management for objects. OAM also manages storage and retrieval for tape volumes that are contained in system-managed libraries.

DFSMSdss

Data movement and replication

DFSMSdss™ lets you move or copy data between volumes of like and unlike device types. If you create a backup in DFSMSdss, you can copy a backup copy of data. DFSMSdss also can produce multiple backup copies during a dump operation.

Space management

DFSMSdss can reduce or eliminate DASD free-space fragmentation.

Data backup and recovery

DFSMSdss provides you with host system backup and recovery functions at both the data set and volume levels. It also includes a stand-alone restore program that you can run without a host operating system.

Data set and volume conversion

DFSMSdss can convert your data sets and volumes to system-managed storage. It can also return your data to a non-system-managed state as part of a recovery procedure.

DFSMShsm

Storage management

DFSMShsm™ provides automatic DASD storage management, relieving users from manual storage management tasks.

Space management

DFSMShsm improves DASD space usage by keeping only active data on fast-access storage devices. It automatically frees space on user volumes by deleting eligible data sets, releasing overallocated space, and moving low-activity data to lower cost-per-byte devices, even if the job did not request tape.

Tape mount management

DFSMShsm can write multiple output data sets to a single tape, making it a useful tool for implementing tape mount management under SMS. When you redirect tape data set allocations to DASD, DFSMShsm can move those data sets to tape, as a group, during interval migration. This methodology greatly reduces the number of tape mounts on the system. DFSMShsm uses a single-file format, which improves your tape usage and search capabilities.

Availability management

DFSMShsm backs up your data—automatically or by command—to ensure availability if accidental loss of the data sets or physical loss of volumes should occur. DFSMShsm also allows the storage administrator to copy backup and migration tapes, and to specify that copies be made in parallel with the original. You can store the copies on site as protection from media damage, or offsite as protection from site damage. DFSMShsm also provides disaster backup and recovery for user-defined groups of data sets (aggregates) so that you can restore critical applications at the same location or at an offsite location.

DFSMSrmm

Library Management

You can create tape libraries, or collections of tape media associated with tape drives, to balance the work of your tape drives and help the operators that use them.

Shelf Management

DFSMSrmm™ groups information about removable media by shelves into a central online inventory, and keeps track of the volumes residing on those shelves. DFSMSrmm can manage the shelf space that you define in your removable media library and in your storage locations.

Volume management

DFSMSrmm manages the movement and retention of tape volumes throughout their life cycle.

Data set management

DFSMSrmm records information about the data sets on tape volumes. DFSMSrmm uses the data set information to validate volumes and to control the retention and movement of those data sets.

DFSMStvs

DFSMS Transactional VSAM Services (DFSMStvs) allows you to share VSAM data sets across CICS®, batch, and object-oriented applications on z/OS or distributed systems. DFSMStvs enables concurrent shared updates of recoverable VSAM data sets by CICS transactions and multiple batch applications. DFSMStvs enables 24-hour availability of CICS and batch applications. DFSMStvs is built on top of VSAM record-level sharing (RLS), which permits sharing of recoverable VSAM data sets at the record level.