DFSMSHSM STORAGE ADMINISTRATION GUIDE PDF

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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To stop such a command from interfering with your use of your atorage, have the computer system operator issue a HOLD command for the function that is causing the interference.

DFSMShsm can create backup versions of data sets either automatically or by command. Making disaster backup copies of DFSMShsm-owned tape volumeswhich describes how to make backup copies of DFSMShsm-owned, cartridge-type, single-file-format tape volumes and how to recover those volumes. Note, that the first four commands are only for diagnosis and repair. You can specify how frequently to back up data sets on a data set basis for SMS-managed data sets and on a system-wide basis for non-SMS-managed volumes.

You can use restore or recover processing to: DFSMShsm keeps generations of dump copies for any given sdministration unless all the copies in a generation expire. It contains examples of the commands needed to perform the tasks, descriptions of the processing that DFSMShsm performs, and examples of the results of that processing.

Fast replication function Fast replication uses volume-level fast replication to create backup versions for sets of storage groups. When it first uses unassigned backup volumes, DFSMShsm assigns the volumes as daily or spill backup volumes.

Recovery from a fast replication backup version 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 the data set level from a disk or tape copy. Functions of availability management: When DFSMShsm needs another daily backup volume, it chooses an unassigned daily backup volume before it chooses an unassigned backup volume.

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Fast replication uses volume-level fast replication to create backup versions for sets stlrage storage groups. Migrate individual data sets or eligible data sets on a volume by command. Recovery is the process of retrieving a full-volume dump or a backup version of a data set or a volume.

DFSMShsm Storage Administration Guide

This Fast Replication function enables the backup and recovery of a large set of volumes to occur within a small time frame. This topic contains detailed explanations of the operator, storage administrator, and system programmer commands, which are listed in alphabetical order.

Update specific fields within the control data sets: Backs up aggregate groups of user-defined data sets for recovery at another location.

Adminiwtration references to original tapes with references to alternate tapes.

IBM z/OS DFSMShsm Storage Administration (SC)

Space management is the DFSMShsm program function that you use to ensure that your customers have space available on DASD volumes to allocate new data sets or to extend old ones. Backup is the process of copying a data set from a level 0 or an ML1 volume to daily backup volume.

Backup function Backup is the process of copying a data set from a level 0 or an ML1 volume to daily backup volume. DFSMShsm creates these backup versions during the backup of a level 0 volume or during the backup of dfsmsusm data sets. DFSMShsm allows from one to five dump copies to be made concurrently for any one full-volume dump.

Recall migrated data sets to level 0 volumes by command. The space management functions begin at a specified time of day and administratioon on a specific day of a cycle. Restore a volume from a full-volume dump. Moving the data sets as opposed to deleting or removing unused space from them is called migration.

This operation is called automatic primary space management.

DFSMShsm automatically creates backup versions of data sets on specified days beginning at a specified time of day. By command, back up user data sets.

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DFSMShsm Storage Administration Reference

Dump is the process of copying all data from a DASD volume to dump tape volumes. Deletes one or more unneeded fast replication backup versions. This command also corrects discrepancies in the common recall queue. 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.

This is known as incremental backup. The difference between dump and backup is that the dump function backs up the entire allocated space on a volume, whereas the DFSMShsm backup function backs up individual data xfsmshsm. The data sets must meet eligibility criteria and must be on DFSMShsm-managed volumes that have been designated for automatic backup.

z/OS DFSMShsm Storage Administration

Each dump copy is a complete image of the dumped volume, not just an incremental backup of selected data sets. It describes a variety of situations where data is lost, and what steps to take to recover that data. Changes the number of backup versions maintained and the frequency of creating backup versions for a non-SMS-managed data set. Automatically, or by command, migrate data sets from level 1 migration volumes to level 2 migration volumes. There are two types of unassigned volumes: Spill backup volumes contain older backup versions of data sets.

It also includes situations where the lost data is a control data set or journal. Delete eligible non-SMS migrated data sets on a migration volume by command. Fast replication target volumes: Removes a volume from the list of volumes managed by DFSMShsm and changes existing volume information.