HP XP P9500 Storage - Manual (Page 13)

◦ Changing the system configuration.
◦ Replacing the micro program.
Viewing the WWN monitoring data
To start monitoring traffic between host bus adapters and storage system ports, you must make
settings before starting monitoring. For details, see topics between
“Displaying WWNs to be
monitored ” (page 17) and “Deleting WWNs from monitoring target objects ” (page 19) .
Replacing the microcode
After the microcode was replaced, the monitoring data is not stored until a service engineer releases
the SVP from Modify mode. Therefore, inaccurate monitoring data may be displayed temporarily.
Changing the time setting of SVP
If the monitoring switch function is performed, do not change the time setting of SVP. If the time
setting is changed, the following problems may occur:
•
Invalid monitoring data is displayed.
•
Monitoring data cannot be obtained.
If the time setting of SVP is changed, turn off the monitoring switch and then turn on the switch.
After that, obtain the monitoring data. For details about the monitoring switch, see
(page 20) .
Using Performance Control
•
Starting Performance Control. Ensure that the Time Range in the Monitor Performance window
is not set to Use Real Time. You cannot start Performance Control in real-time mode.
•
I/O rates and transfer rates. Performance Control runs based on I/O rates and transfer rates
measured by Performance Monitor. Performance Monitor measures I/O rates and transfer
rates every second, and calculates the average I/O rate and the average transfer rate for
every gathering interval (specified between 1 and 15 minutes) regularly.
Suppose that 1 minute is specified as the gathering interval and the I/O rate at the port 1-A
changes as illustrated in Graph 1. When you use Performance Monitor to display the I/O
rate graph for 1A, the line in the graph indicates changes in the average I/O rate calculated
every minute (refer to Graph 2). If you select the Detail check box in the Performance Monitor
windows, the graph displays changes in the maximum, average, and minimum I/O rates in
one minute.
Performance Control applies upper limits and thresholds to the average I/O rate or the average
transfer rate calculated every gathering interval. For example, in the following figures in which
the gathering interval is 1 minute, if you set an upper limit of 150 IO/s to the port 1A, the
highest data point in the line CL1-A in Graph 2 and the line Ave.(1 min) in Graph 3 is
somewhere around 150 IO/s. It is possible that the lines Max (1 min.) and Min (1 min.) in
Graph 3 might exceed the upper limit.
Figure 2 Graph 1: actual I/O rate (measured every second)
Viewing the WWN monitoring data 13