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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Moves all migration copies meeting a specified age criteria between DFSMShsm migration or backup volumes. The space management functions begin at a specified time of day and only on a specific day of a cycle.
Restore a data set from a dump copy. If DFSMShsm finds any volume without the specified amount of space, it performs migration from all such volumes known as event-driven migration following a space check. Migrate individual data sets or eligible data sets on a volume by command.
Fast replication function Fast replication uses volume-level fast replication to create backup versions for sets of storage groups. Functions of space management: 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.
Guire creates the multiple copies and continues its full-volume-dump process as long as one output copy is good. Recovery and restore of data sets Recovery and restore are processes that are requested only by command, not automatically, for backed up data sets. The purpose of the full-volume dump is to expedite the recovery process when an dfsmmshsm volume is lost or damaged and to supplement the incremental recovery process.
DFSMShsm creates these backup versions during the backup of a level 0 volume or during the backup administrahion migrated data sets. However, the daily backup volume used to contain these manually backed up versions dfdmshsm not necessarily correspond to the day in the backup cycle when DFSMShsm created the backup version.
DFSMShsm Storage Administration Reference
DFSMShsm Storage Administration Reference This topic contains detailed explanations of the operator, storage administrator, and system programmer commands, which are listed in alphabetical order. Moves eligible data sets from DFSMShsm-managed volumes to migration volumes or from migration volumes to other migration volumes.
You can make the space available by deleting administratioon sets that have outlived their usefulness, removing unused allocated space administrattion data sets, moving low-activity data sets from level 0 volumes to other DASD or tape volumes, and returning the moved data sets to the level 0 devices when the data sets are needed. 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.
You can 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. Allow your customers to issue commands to recover their own data dfxmshsm. By command, recover data sets from fast replication backup versions. You can specify how frequently to back up data sets on a data set basis stotage SMS-managed data sets and on a system-wide basis for non-SMS-managed volumes.
This is known as incremental backup.
Availability management procedureswhich describes procedures for starting and stopping availability management under varying conditions. DFSMSdss discontinues writing to dump copies on which errors occur.
Requests that Storaeg 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. Each successive full-volume dump of a volume, regardless of the number of dump copies, is a generation. Note, that the first four commands are only for diagnosis and repair. By command, recover a specific data set from either a dump copy or an incremental backup version.
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. Uses fast replication to recover a single dfzmshsm or a pool of volumes from the managed backup versions. Other commands can also run for a long time. Requesting a fast replication recovery HOLD command: It describes a variety of situations where data is lost, and what steps to take to recover that data.
Recovery is the process of retrieving a full-volume dump or a backup version of a data set or a volume. This command adminisstration corrects discrepancies in the common recall queue. Data recovery scenariosdescribes real-life examples of data loss and recovery situations.
Space management proceduresdescribes procedures for starting and stopping space management under varying conditions. This Administratiom Replication function enables the backup and recovery of a large set of volumes to occur within a small time frame. Restore a volume from a full-volume dump and update the volume from later incremental backup versions.
Fast replication target volumes contain the fast replication backup copies of DFSMShsm-managed volumes. Recover a data set from the fast replication backup versions on DASD or tape. Delete eligible non-SMS migrated data sets on a migration volume by command. Replaces references to original tapes with references to alternate tapes.
DFSMShsm volume recovery can use incremental backups or full-volume dumps or both. Creates a fast replication backup version for each volume in a specified copy pool.
IBM z/OS DFSMShsm Storage Administration (SC)
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 storage management subsystem SMS. Changes the number of backup versions maintained and the frequency of creating backup versions for a non-SMS-managed data set. Availability management of non-SMS-managed storagewhich describes the tasks to be performed and the results of processing for availability management of data dfsmshsj not managed by SMS.
The full-volume-dump process can be one volume in and one dump copy out. Restore a volume from a full-volume dump. Recall migrated data sets to level 0 volumes by command.