HP XP Array Manager Software - Manual (Page 55)

Letter Displayed in The Cell CU Monitoring Status CU Exists
None CU is not being monitored
N: in black CU will be monitored when it exists
No –: Hyphen in black bold CU is to be released from monitoring
–: Hyphen in black CU will not be monitored when it exists
Performance Monitor has two kinds of periods (ranges) for collecting and storing statistics: short range
and long range.
The storing period of statistics in short range is determined by the settings of Gathering Interval option.
Performance Monitor saves the statistics obtained up to 1440 times in SVP. Therefore, you can estimate
the storing period of statistics with gathering interval multiplied by 1440. For example, if you specify
one minute for the gathering interval, the statistics for one day can be stored at the maximum from
the following formula:
1 minute x 1440 = 1440 minutes = 24 hours = 1 day
This storing period is the range of display in the Auto LUN windows. When you specify one minute
for the gathering interval like the example above, Performance Monitor can display the statistics for
one day (that is, 24 hours) in the list and graph at the maximum. Also, when you specify 15 minutes
for the gathering interval, Performance Monitor can display the statistics for 15 days in the list and
graph at the maximum.
However, the value of the Gathering Interval option has nothing to do with the storing period of
statistics in long range monitoring. The gathering interval in long range is fixed to 15 minutes. Therefore,
when you select the longrange storing period in the Physical tab of Performance Monitor, the display
range in the window is always three months (that is, 93 days).
The monitoring switch settings in the Monitoring Options window work in conjunction with the
monitoring switch settings in the Usage Monitor windows of XP Continuous Access, TrueCopy for
Mainframe, XP Continuous Access Journal, and Universal Replicator for Mainframe. Therefore, if you
use the Monitoring Options window to start or stop monitoring, or to change the gathering interval,
the monitoring settings of these remote copy functions will also change. Conversely, if the settings in
each Usage Monitor window are changed, the settings in the Monitoring Options window of
Performance Monitor also change automatically.
Other Windows
Apart from the Performance Monitor window and its tabs, the Performance Monitor interface also
includes the following windows:
• Continuous Access Monitor window
This window displays the information about remote copy operation of XP Continuous Access. The
contents in this window are the same as those of the Usage Monitor window of XP Continuous
Access. For details on the contents in this window, see HP StorageWorks XP24000/XP20000
Continuous Access Software User Guide.
• TC MF Monitor window
This window displays the information about remote copy operation of TrueCopy for Mainframe.
The contents in this window are the same as those of the Usage Monitor window of TrueCopy for
Mainframe. For details on the contents in this window, see Hitachi TrueCopy™ for Mainframe
User Guide: HP XP24000 Disk Array, HP XP20000 Disk Array.
XP24000/XP20000 Performance Monitor User Guide 55