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Monitoring LU Paths
Performance Monitor monitors LU paths and measures I/O rates (that is, the
number of I/Os per second) and transfer rates (that is, the size of data
transferred per second). This section describes how to view I/O rates and
transfer rates of LU paths on the storage system. Before taking the following
steps, you need to start monitoring in accordance with the procedure
described in Starting and Stopping Storage System Monitoring and obtain the
usage statistics.
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 Paths 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 Performance Management 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 Statistics.
5. In the tree, double-click a port (for example,
host group (
The LUN icon (
6. Select LUN.
The list on the right displays a list of LU paths and I/O rates.
Hitachi Universal Storage Platform V/VM Hitachi Performance Manager User's Guide
).
) appears.
Performance Monitor Operations
or
) and then select a
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