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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Fast replication function Fast replication uses volume-level fast replication to create dfssmhsm versions for sets of storage groups. Tape spill volumes also receive all valid backup versions of data sets when a tape backup volume is recycled.
Data recovery scenarios Data recovery scenariosdescribes real-life examples of data loss and recovery situations.
DFSMShsm Storage Administration Guide
This copy is called a backup version. Recover a pool of volumes from the fast replication backup versions on DASD. Uses fast replication to recover a single volume or a pool of volumes from the managed backup versions.
This Fast Replication guidd enables the backup and recovery of a large set of volumes to occur within a small time frame. Migrate individual data sets or eligible data sets on a volume by command. It describes a variety of situations where data is lost, and what steps to take to recover that data. By command, back up user data sets. DFSMShsm volume recovery can use incremental backups or full-volume dumps or both.
DFSMShsm Storage Administration Reference
Fast replication target volumes contain the fast replication backup copies of DFSMShsm-managed volumes. Automatically or by command, create a dump copy of a fast replication DASD backup version By command, recover volumes that have a fast replication backup version. Table 2 shows these commands and the SMS construct that assumes their functions. Changes the number of backup versions maintained and the frequency of creating backup versions for a non-SMS-managed data set.
Recovery from a fast replication backup version can be performed at the copy pool level from a disk gulde, at the individual volume level from a disk or tape copy, or at the data set level from a disk or tape copy. Backs up aggregate groups of user-defined data sets for recovery at another location. DFSMSdss creates the multiple copies and continues its full-volume-dump process as long as one output copy is good. Moving the data sets as opposed to deleting or removing unused space from them is called migration.
Recover a single volume from the fast dfsmhssm backup versions on DASD or tape.
IBM z/OS DFSMShsm Storage Administration (SC)
The fast replication backup versions can be dumped to tape. Backup function Backup is the process of copying a data set from a level 0 or an ML1 volume to daily backup volume. Delete eligible data sets on a non-SMS-managed volume by command. This command also corrects discrepancies in the common recall queue. This is known as incremental backup.
Availability management procedureswhich describes procedures for starting and stopping availability management under varying conditions. Space management of SMS-managed storagedescribes the tasks to gguide performed and the results of processing for space management of data sets managed by the storage management subsystem SMS. Operating procedures for DFSMShsmdescribes procedures to be performed by the computing system operator.
Restore a data set from a dump copy.
DFSMShsm Storage Administration Reference
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 sets. Automatically, or by command, migrate data sets from level administrattion migration volumes to level 2 migration volumes.
Other xtorage can also run for a long time. The data sets must meet eligibility criteria and must be on DFSMShsm-managed volumes that have been designated for automatic backup. Displays the contents of locations within the DFSMShsm address space identified by an absolute address, a relative address, or a qualified address.
Recall migrated data sets to level 0 volumes by command. DFSMShsm creates these backup versions during the backup of a level 0 volume or during the backup of migrated data sets.
Fast replication uses volume-level fast replication to create backup versions for sets of storage groups. Each successive full-volume dump of a volume, regardless of the number of dump copies, is a generation.
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.