Performance
Monitor
Operations
5-43
Hitachi Universal Storage Platform V/VM Hitachi Performance Manager User’s Guide
•
Response Time
: This column indicates the time for replying from the LU
paths when I/O accesses are made from the host to the LU paths. The unit
is milliseconds. The average response time in the period specified at
Monitoring Term
is displayed.
Viewing LU Paths Transfer Rates
Performance Monitor monitors LU paths and measures transfer rates (that is,
the size of data transferred in one second).
To view transfer rates:
1.
Ensure that the
Performance Management
window is displayed.
2.
Select the
Port-LUN
tab.
The tree displays a list of ports on the storage system.
3.
Select
MB/s
from the list on the right side of the window.
4.
In
Monitoring Term
, do one of the following:
–
To view the transfer 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 transfer 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
Tab of the Performance Monitor Window.
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 transfer rates.
7.
If you want to display a graph to find out how the transfer 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 transfer 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
.