Tuning patches supported by DFSMShsm

This topic describes tuning patches that are supported by DFSMShsm.

Changing DFSMShsm backup and migration generated data set names to reduce contention for similar names and eliminating a possible performance degradation
Migrating and scratching generation data sets
Disabling backup and migration of data sets that are larger than 64K tracks to ML1 volumes
Disabling, in JES3, the delay in issuing PARTREL (partial release) for generation data sets
Using DFSMShsm in a JES3 environment that performs main device scheduling only for tapes
Shortening the prevent-migration activity for JES3 setups
Replacing HSMACT as the high-level qualifier for activity logs
Changing the allocation parameters for an output data set
Buffering of user data sets on DFSMShsm-owned DASD using optimum DASD blocking
Changing parameters passed to DFSMSdss
Enabling ABARS ABACKUP and ARECOVER to wait for a tape unit allocation
Changing the RACF FACILITY CLASS ID for the console operator’s terminal
Handling independent-software-vendor data in the data set VTOC entry
Allowing DFSMShsm automatic functions to process volumes other than once per day
Changing the frequency of running interval migration
Changing the frequency of running on-demand migration again on a volume that remains at or above the high threshold
Reducing enqueue times on the GDG base or on ARCENQG and the fully qualified GDS name
Modifying the migration queue limit value
Changing the default tape data set names that DFSMShsm uses for tape copy and full volume dump
Preventing interactive TSO users from being placed in a wait state during a data set recall
Preventing ABARS ABACKUP processing from creating an extra tape volume for the instruction data set and activity log files
Preventing ABARS ABACKUP processing from including multivolume BDAM data sets
Specifying the amount of time to wait for an ABARS secondary address space to initialize
Patching ABARS to use NOVALIDATE when invoking DFSMSdss
Patching ABARS to provide dumps whenever specific errors occur during DFSMSdss processing during ABACKUP and ARECOVER
Routing ABARS ARC6030I message to the operator console
Filtering storage group and copy pool ARC0570I messages (return code 17 and 36)
Allowing DFSMShsm to issue serialization error messages for class transitions
Enabling ARC1001I messages to be written to activity logs
Enabling ARC1901I messages to go to the operator console
Changing the notification limit percentage value to issue ARC1901I messages
Patching to prevent ABARS from automatically cleaning up residual versions of ABACKUP output files
Enabling the serialization of ML2 data sets between RECYCLE and ABACKUP
Changing the default number of recall retries for a data set residing on a volume in use by RECYCLE or TAPECOPY processing
Changing the default number of buffers that DFSMShsm uses to back up and migrate data sets
Changing the compaction-ratio estimate for data written to tape
Enabling the takeaway function during TAPECOPY processing
Changing the delay by recall before taking away a needed ML2 tape from ABACKUP
Disabling delete-if-backed-up (DBU) processing for SMS data sets
Requesting the message issued for SETSYS TAPEOUTPUTPROMPT processing be WTOR instead of the default WTO
Removing ACL as a condition for D/T3480 esoteric unit name translation
Restricting non-SMS ML2 tape volume table tape selection to the SETSYS unit name of a function
Changing the amount of time ABACKUP waits for an ML2 volume to become available
Changing the amount of time an ABACKUP or ARECOVER waits for a resource in use by another task
Preventing deadlocks during volume dumps
Modifying the number of elapsed days for a checkpointed data set
Running concurrent multiple recycles within a single GRSplex
Patching to force UCBs to be OBTAINed each time a volume is space checked
Running conditional tracing
Using the tape span size value regardless of data set size
Updating MC1 free space information for ML1 volumes after an return code 37 in a multi-host environment
Allowing DFSMShsm to use the 3590-1 generic unit when it contains mixed track technology drives
Allowing functions to release ARCENQG and ARCCAT or ARCGPA and ARCCAT for CDS backup to continue
Suppressing SYNCDEV for alternate tapes during duplex migration
Patching to allow building of a dummy MCD record for large data sets whose estimated compacted size exceeds the 64 KB track DASD limit
Allowing DFSMShsm to honor an explicit expiration date even if the current management class retention limit equals 0
Using the generic rather than the esoteric unit name for duplex generated tape copies
Modifying the allocation quantities for catalog information data sets
Enabling volume backup to process data sets with names ending with .LIST, .OUTLIST or .LINKLIST
Prompting before removing volumes in an HSMplex environment
Returning to the previous method of serializing on a GDS data set during migration
Allowing DFSMShsm to create backup copies older than the latest retained-days copy
Enabling or disabling RC 20 through RC 40 ARCMDEXT return code for transitions
Enabling FSR records to be recorded for errors, reported by message ARC0734I, found during SMS data set eligibility checking for primary space management
Patch for FRRECOV COPYPOOL FROMDUMP performance to bypass the EXCLUSIVE NONSPEC ENQ
Issuing the ABARS ARC6055I ABACKUP ending message as a single line WTO
Prohibiting the LIST DSN command
Allowing DFSMShsm to create encryption information in migration and backup control data sets
Controlling the issuance of ARC1334I - Backup Version Not Created
Suppressing RACF ICHxxx messages for UNIX files
Enabling backup and migration/expiration processing of empty data sets
Specifying the maximum amount of time to wait for the Cloud Container creation
Allowing HSM to use more than 7800 ML1 volumes
Changing the default number of days a backup copy is retained for UNIX files
Allowing DFSMShsm ABARS ARECOVER to use the VSAM RLS
Allowing FlashCopy to be used for transition processing when there is no valid DFSMShsm backup
Allowing special objects in BDELETE command
Earlier checking for primary space management
Setting the maximum number of CEC volumes to be migrated to cloud simultaneously
Setting wait time for disk controller thread to become available when migrating to cloud object storage
Setting the interval for issuing the Disk Controller busy, ARC1587I, message
Setting the maximum wait time in seconds to get a disk controller for moving data to the cloud
Allowing FlashCopy to be used for transition processing when there is no valid HSM backup
Prevent checking to see whether any MCDX type '3' records need to be converted
Modifying fast VTOC/VVDS access services processing by subsets
Modifying the migration queue processing by subsets
Reducing the storage used when directories are processed during UNIX file backup
Writing success or failure messages for UNIX file backup to the backup activity log
Requesting ARC0019I messages to be sent to the SDSF SYSLOG

Parent topic: Tuning DFSMShsm