z/OS DFSMShsm Storage Administration to use IBM z/OS DFSMShsm, a component of DFSMS that manages your storage in a ( MB). For additional information on SETSYS parameters reference the DFSMShsm Storage Administration. Reference manual (SC). |. •. HSMSTSYS. Today’s storage arrays offer Automated Storage Tiering features DFSMShsm – A long history of reducing storage cost Administration Guide.

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You can use restore or recover processing to: Deletes a migrated data set without recalling the data set. Space management of non-SMS-managed storagedescribes the tasks to be performed and the results of processing for space management of data sets not managed by SMS. Moves eligible data sets from DFSMShsm-managed volumes to migration volumes or from migration volumes to other migration volumes.

The space management functions begin at a specified time of day and only on a specific day of a cycle. Backup is the process of copying a data set from a level 0 or an ML1 volume to daily backup volume. Requests that DFSMShsm back up eligible data sets on one or more volumes, in one or more storage groups, or on all primary volumes; or that it back up the control data sets.

DFSMShsm Storage Administration Guide

Allow your customers to issue commands to recover their own data sets. Recover a single volume from the fast replication backup versions on DASD or tape.

DFSMShsm can use these volumes only as daily backup volumes, but DFSMShsm determines which day in the backup cycle the volume should be assigned to when it first uses the volume. Restore a volume from a full-volume dump.

z/OS DFSMShsm Storage Administration

Space management The following topics introduce the tasks necessary to control space management functions. Deletes all the backup versions or specific backup versions of a specific data set.

DFSMShsm allows from one to five dump copies to be made concurrently for any one full-volume dump. Recovery from a fast replication backup guife can be performed at the copy pool level from a disk copy, at the individual volume level from a disk or tape copy, or at stotage data set level from a disk or tape copy.


It describes a variety of situations where data is lost, and what steps to take to recover that data. Automatically, or by command, migrate data sets from level 1 migration volumes to level 2 migration volumes.

This topic contains detailed explanations of the operator, storage administrator, and system programmer commands, which are listed in alphabetical order. You stodage use FRBACKUP to dump an existing fast replication backup version, or when no backup version exists, create a fast replication backup version and dump it to tape.

Availability management procedureswhich describes procedures for starting and stopping availability management under varying conditions. Replaces references to original tapes with references to alternate tapes.

DFSMShsm Storage Administration Guide

Spill backup volumes contain older backup versions of data sets. You are introduced to the example system, which is referred to throughout the rest of this document. You can make the space available by deleting data sets that have outlived their usefulness, removing unused allocated space from data sets, moving low-activity data sets from level 0 volumes to other Storate or tape volumes, and returning the moved data sets to the level 0 devices when the data sets are needed.

The dump time stamps reflect when the fast replication backup version is made, not the actual time of the dumps. Making disaster backup copies of DFSMShsm-owned tape volumeswhich describes guice to make backup copies of DFSMShsm-owned, cartridge-type, single-file-format tape volumes and how to recover those adkinistration.

Requesting a fast replication recovery HOLD command: Use the following commands and parameters to determine dvsmshsm DFSMShsm creates these backup versions during the backup of a level 0 volume or during the backup of migrated data sets. Unassigned backup volumes are those volumes defined to DFSMShsm as backup volumes but not specified as daily or spill backup volumes.

DFSMShsm can create backup versions of data sets either automatically or by command. Space management is the DFSMShsm program function dfsmsgsm you use to ddfsmshsm that your customers have space available on DASD volumes to allocate new data sets or to extend old ones. Availability management is the function of the DFSMShsm program that you use to ensure that your customers can retrieve usable copies of their data sets should their online copies become lost or damaged.


Delete eligible data sets on a non-SMS-managed volume by command. Availability management of SMS-managed storagewhich describes the tasks to be performed and the results administratipn processing for availability management of data sets managed by SMS.

This operation is called automatic primary space management.

IBM z/OS DFSMShsm Storage Administration (SC)

Backs up aggregate groups of user-defined data sets for recovery at another location. Recovery is the process of retrieving a full-volume dump or storsge backup version of a data set or a volume. The purpose of the full-volume dump is to expedite the recovery process when an entire volume is lost or damaged and to supplement the incremental recovery process. Recovery and restore of data sets Recovery and restore are processes that are requested only by command, not automatically, for backed up data sets.

This is known as incremental backup. DFSMSdss discontinues writing to dump copies on which errors occur.

Functions of availability management: Moving the data administratioj as opposed to deleting or removing unused space from them is called migration. Each dump copy is a complete administratiion of the dumped volume, not just an incremental dfamshsm of selected data sets.

DFSMShsm volume recovery can use incremental backups or full-volume dumps or both. The data sets must meet eligibility criteria and must be on DFSMShsm-managed volumes that have been designated for automatic backup. DFSMShsm discards the contents of only the bad copies and issues an appropriate message. When the generations for a particular volume have been reached and the next full-volume dump for that volume is performed, the control records for the oldest generation are discarded, regardless of the retention periods of the individual copies.