Viewing lu path i/o rates – HP XP Array Manager Software User Manual
Page 89
The traffic statistics reported for an LU is aggregated across all LU paths defined for an LU.
•
I/O rate is the sum of I/Os across all LU paths defined for an LU.
•
Transfer rate is the total transfer rate across all LU paths defined for an LU.
•
Response time is the average response time across all LU paths defined for an LU.
Viewing LU Path I/O Rates
Performance Monitor monitors LU paths and measures I/O rates (that is, the number of disk I/Os per
second).
To view I/O rates:
1.
Ensure that the Auto LUN window is displayed.
2.
Select the Port-LUN tab.
The tree displays a list of ports on the storage system.
3.
Select IOPS from the list on the right side of the window.
4.
In Monitoring Term, do one of the following:
• To view the I/O rate in real time, you must select the Real Time option, specify the number
of recent collections of statistics which should be displayed in the graph, and then click Apply.
• To view I/O rates for a certain period of time in the last 24 hours, you must select the From
option, change the date and time in the From and To boxes, and then click Apply. Use the
arrow button and the sliders when you change the date and time in the From and To boxes.
For details on the Real Time option and the From option, see “
Viewing Port Workload Statist-
5.
In the tree, double-click a port (for example,
or
) and then select a host group (
).
The LUN icon (
) appears.
6.
Select LUN.
The list on the right displays a list of LU paths and I/O rates.
7.
To display a graph to find out how the I/O rate has been changed, take the following steps;
a.
In the list, select one or more LUNs.
b.
Click Draw.
NOTE:
If the graph does not display changes in the I/O rate (for example, if the line in the graph
runs vertically), it is recommended that you change the value in the Chart Y Axis Rate list.
For example, if the largest value in the list is 200 and the value in Chart Y Axis Rate is 100,
you should select a value larger than 200 from Chart Y Axis Rate.
8.
To view more detailed information in the graph, select the Detail check box at the lower right of
the list. The graph contents change as described in
NOTE:
If more than one row is selected in the list, you cannot select the Detail check box.
XP24000/XP20000 Performance Monitor User Guide
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