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Appendix A Commands of Performance Monitoring/Optimization Function
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[ NAME ]
iSMprfctl - Moves logical disks.
[ SYNOPSIS ]
iSMprfctl start_ldmv
-arrayname Disk Array Subsystem name
| -ldn logical-disk-number | -ldname [volume-format:] logical-disk-name
| -wkldn logical-disk-number | -wkldname [volume-format:] logical-disk-name
[ -speed | auto | high | ]
[ DESCRIPTI/ON ]
The iSMprfctl command moves logical disks for optimizing performance. If a RANK is a bottleneck
in performance due to the concentration of I/O operations, you can move logical disks from the RANK
to a low-load RANK by using the logical disk movement function (start_ldmv) of the iSMprfctl
command. The logical disks on the low-load RANK as the destination are dedicated disks called
work disks for optimization. The work disks for optimization need to be preset by the LD
Administrator function of iSM.
Do not attempt to move the following logical disks in order to maintain the effect of tuning. Be very
careful in determining the disk array configuration.
The capacity of the logical disk to be moved is different from that of the work disk for
optimization.
The logical disk to be moved and the work disk for optimization are on the same RANK.
The logical disk to be moved is of the multi-RANK type.
The logical disk movement function only starts moving logical disks and terminates soon after starting
the target logical disk. To confirm information about the progress of the logical disk moving, view
the client screen dedicated to performance optimization. To confirm the completion of moving, view
the client screen dedicated to performance optimization or the message output to the operation log.
Options
-arrayname Disk Array Subsystem name
Specify the nickname of the disk array on which the logical disk to be moved is bound.
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