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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This function and the following one are known as automatic secondary space management. Use the following commands and parameters to determine status: Aggregate backup and recovery support ABARSwhich describes the command-driven functions that back up and recover a user-defined group aggregate group of data sets.
You are introduced to the example system, which is referred to throughout the rest of this document. By command, recover a specific data set from either a dump copy or an incremental backup version. Each dump copy in a generation is associated with a different dump class, which specifies how the dump copy is to be managed. 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.
Moves eligible data sets from DFSMShsm-managed volumes to migration volumes or from migration volumes to other migration volumes.
DFSMShsm uses unassigned volumes whenever it needs more daily or spill backup volumes. This is known as incremental backup. By command, recover data sets from fast replication backup versions.
DFSMShsm Storage Administration Reference
When all dump copies in any generation for a volume reach their expiration dates, DFSMShsm deletes that generation from its records. 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. DFSMShsm volume recovery can use incremental backups dfsmssm full-volume dumps or both.
Instead, the daily backup volume corresponds to the day in the backup cycle that DFSMShsm moved the backup version from its temporary location on an ML1 volume to a daily backup volume. You can dump different groups of volumes on different days storagd different periods for the number of days between dumps.
By command, back up data sets of an application to tape so they can be taken to another computer site for recovery. 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.
The fast replication backup versions can be dumped to tape. Recover a data set from the fast replication backup versions on DASD or tape.
z/OS DFSMShsm Storage Administration
Deletes one or more unneeded fast replication backup versions. This operation is called automatic primary space management. Automatically, or by command, migrate data sets from level 1 migration volumes to level 2 migration volumes. Combines the entries in the journal data set with a restored backup copy of one or all of the control data sets.
DFSMShsm Storage Administration Guide
Availability management The following topics introduce the tasks admimistration to control availability management functions. Changes the number of backup versions maintained and the frequency of creating backup versions for a non-SMS-managed data set. Space management of SMS-managed storagedescribes the tasks to be performed and the results of processing for space management of data sets managed by the xfsmshsm management subsystem SMS.
The purpose of backup is to have copies of data sets in case something happens to the original data sets.
Availability management of non-SMS-managed storagewhich describes the tasks to be performed and the results of processing for availability management of data sets not managed by SMS.
Recover a pool of volumes from the fast replication storate versions on DASD. Deletes a migrated aministration set without recalling the data set. In an SMS environment, the storage management functions defined in the management class and the storage group control the SMS-managed data sets in place of the parameter or command definitions within DFSMShsm.
DFSMShsm discards the contents of only the bad copies and issues an appropriate message. By command, restore a volume from a dump copy and update the restored volume from later incremental backup versions.
How to use this document. Tape spill volumes also receive all valid backup versions of data sets when a tape backup volume is recycled. In all cases, the dump copies are associated with the original source DASD volumes in the copy pool, but not with the target DASD volumes that are actually dumped.
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. You can define a set of storage groups through the SMS copy pool construct. When it first uses unassigned backup volumes, DFSMShsm assigns the volumes as daily or spill backup volumes.
If all copies fail, the full-volume dump is failed. Fast replication target volumes contain the fast replication backup copies of DFSMShsm-managed volumes. Moves all migration copies meeting a specified age criteria between DFSMShsm migration or backup volumes.