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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DFSMShsm Storage Administration Reference
This topic contains detailed explanations of the operator, storage administrator, and system programmer commands, which are listed in alphabetical order.
Long-running commands are limited to admibistration only one of each such command being performed by DFSMShsm at any time. Other commands can also run for a long time. If a command is stoorage for a long time and is returning data to your terminal, you can be prevented from performing other operations at your terminal.
To stop such a command from interfering with your use of your terminal, have the computer system operator issue a HOLD command for the function that is causing the interference. The list command that is causing you trouble does not restart. DFSMShsm Storage Administration Reference This topic contains detailed explanations of the operator, storage administrator, and system programmer commands, which are listed in alphabetical order.
It also defines the automatic backup cycle, the secondary space management cycle, the dump dfsmshs, dump classes, the volumes for aggregate recovery, and times for automatically demounting tapes currently in use by data set backup. Use the following commands and parameters to determine status: This command also corrects discrepancies in the common recall queue.
Use the following commands to maintain and recover the control data sets and the DFSMShsm address space. Note, that the first four commands are only for diagnosis and repair. See Recovering control data sets using the enhanced CDS recovery function for the recommended way to recover control data sets that run outside the DFSMShsm address space.
Use the following commands to directly manage data sets or volumes as opposed to the automatic management functions of DFSMShsm: Also causes the data set backup switchtapes action to occur immediately. 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.
Table 2 shows these commands and the SMS construct that assumes their functions. Requesting a fast replication recovery HOLD command: Replacing cartridge-type tape volumes with their alternate volumes TRAP command: Removes a volume from the list of volumes managed by DFSMShsm and changes existing volume information.
Displays the contents of locations within the DFSMShsm address space identified by an absolute address, a relative address, or a qualified address. Combines the entries in the journal data set with a restored backup copy of one or all of the control data sets.
Update specific fields within the control data sets: Changes the number of backup versions maintained and the frequency of creating backup versions for a non-SMS-managed data set. Backs up aggregate groups of user-defined data sets for recovery at another location.
Creates a backup version of a specific data set. 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. Deletes all the backup versions or specific backup giide of gudie specific data set.
Deletes a migrated data set without recalling the data set. Deletes all eligible expired backup versions from all backup volumes.
z/OS DFSMShsm Storage Administration
Creates a fast replication backup version for each volume in a specified copy pool. Deletes one or more unneeded fast replication backup versions. Moves all migration copies meeting a specified age criteria between DFSMShsm migration or backup volumes.
Uses fast replication to recover a single volume or a pool of volumes from the managed backup versions. Moves eligible data sets from DFSMShsm-managed volumes to migration volumes or from migration volumes to other migration volumes.
Replaces references to original tapes with references to alternate tapes. A specific request number All requests for a particular user All requests for a particular data set.