Explanation
A QUERY command was issued with the SETSYS parameter. DFSMShsm issues
this message to describe the current parameter settings for fast replication
processing.
The message variables are explained:
- Variable
- Meaning
- backup_tasks
- Maximum number of concurrent DFSMSdss invocations that DFSMShsm will process for each
FRBACKUP COPYPOOL command.
The maximum number of concurrent fast
replication backup tasks is the product of backup_tasks and dss_tasks.
- recover_tasks
- Maximum number of concurrent DFSMSdss invocations that DFSMShsm will process for each
FRRECOV COPYPOOL command.
The maximum number of concurrent fast
replication recover tasks is the product of recover_tasks and dss_tasks.
- dss_tasks
- Maximum number of volume pairs that DFSMShsm will pass to each DFSMSdss invocation
to process in parallel for both backup and recover fast replication
functions.
When the FASTREPLICATION command:
- DATASETRECOVERY parameter is set to:
- PREFERRED or not specified, the system will use fast replication
to recover data sets when possible. If fast replication cannot be
used, the system will recover the data set using traditional copy
methods.
- REQUIRED, data set recovery will fail if fast replication cannot
be used.
- NONE, the system uses only traditional copy methods for data set
recovery.
- FCRELATION parameter is set to:
- EXTENT, DFSMShsm will establish FlashCopy® relationship as extent-level
unless the copy pool or backup version is eligible for fast reverse
restore or when the requested FlashCopy function
requires full volume FlashCopy relationship.
- FULL, DFSMShsm will establish FlashCopy relationship
as full volume-level which results in a single relationship between
the volume pair covering the entire volume.
- VOLUMEPAIRMESSAGES parameter is set to:
- YES, DFSMShsm will issue ARC1809I messages.
- NO, DFSMShsm will not issue ARC1809I messages.
System action
DFSMShsm processing continues.
Programmer response