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Chapter 7 Operation of Performance Optimization
This chapter explains how to operate a command provided by NEC Storage PerformanceOptimizer.
The command provided by NEC Storage PerformanceOptimizer can be executed on the server on which NEC Storage
Manager is operating.
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As explained previously, logical disks can be moved through operation on the client screen of NEC Storage
PerformanceOptimizer. NEC Storage PerformanceOptimizer also enables logical disks to be moved by this command
as well as screen operation.
If a shell script or batch file is prepared beforehand, the movement of logical disks can be scheduled by using the
command.
Use the iSMprfctl command to move logical disks. For details on the iSMprfctl command syntax, refer to Appendix
A "Commands of the Performance Monitoring/Optimization Function" of this manual.
(1) Command specification
Use the logical disk movement function (start_ldmv) of the iSMprfctl command to move logical disks. If a logical
disk is to be moved by the command when a bottleneck is detected or preventive maintenance is performed, do
the following beforehand: checking information necessary on the client screen of NEC Storage
PerformanceOptimizer and then specifying the information in the command options. The following information
needs to be specified in the iSMprfctl command:
Disk Array Subsystem
Name of the Disk Array Subsystem containing the Moved Material Logical Disk. Specify the name in the
-arrayname option.
Source logical disk
Logical disk on the RANK that is a bottleneck in performance due to the concentration of I/O operations. The
logical disk number or name should be specified. Specify the logical disk number in the -ldn option or the
logical disk name in the -ldname option.
Work Disk for Optimization
Destination Work Disk for Optimization. The logical disk number or name should be specified. Specify the
logical disk number in the -wkldn option or the logical disk name in the -wkldname option.
LD movement speed
Speed at which data is copied when the logical disk is moved. The speed can be specified by selecting auto or
high in the same manner as for screen operation. The default is auto as the recommended speed.
Predetermine the combination of a source logical disk and a Work Disk for Optimization so that the RANK Busy
Ratio will be leveled. To do so, use the client screen of NEC Storage PerformanceOptimizer.
Consider the business operation state when moving a logical disk and specify the optimum volume movement
speed.
Chapter 7 Operation of Performance Optimization Function (CLI)
Function (CLI)
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