Performance Monitor Operations 5-33
Hitachi Universal Storage Platform V/VM Hitachi Performance Manager User’s Guide
• : When the green checkmark icon is displayed on the left of an item,
the graph displays workload statistics about the parity group, the external
volume group, or the volume.
• PG: Indicates the parity group ID or the external volume group ID. If the
ID starts with the letter "E", the group is an external volume group.
• LDEV: Indicates the volume ID. If the ID ends with the symbol "#", the
volume is a an external volume.
• Emulation: Indicates the emulation type.
• Trans.: Indicates the size (in megabytes) of data transferred to the parity
group, the external volume group, or the volume per second.
• Read Hit: Indicates the read hit ratio.
• Write Hit: Indicates the write hit ratio.
• Back Trans.: Indicates the number of data transfers per second between
the parity group (or the external volume group, or the volume) and the
cache memory.
• Response Time: This column indicates the time for replying from the
parity group, the external volume group, or the volume when I/O accesses
are made from the host to them. The unit is milliseconds. The average
response time in the period specified at Monitoring Term is displayed.
This column displays a hyphen (-) if the I/O rate is 0 (zero).
• CLPR: This column indicates numbers and names of CLPRs corresponding
to each parity group, external volume group, or volume in the format
"CLPR-number
:CLPR-name". For details on CLPRs, see the Virtual Partition
Manager User's Guide.
