• Max.: Indicates the maximum transfer rate for the specified period.

• Response Time: This column indicates the time for replying from the LU path when I/O accesses

are made from the host to the LU path. The unit is milliseconds. The average response time in the

period specified at Monitoring Term is displayed.

This column displays a hyphen (-) if the I/O rate is 0 (zero).

Monitoring Paths between Host Bus Adapters and Ports

If XP Performance Control is enabled, Performance Monitor can be used to monitor paths between

host bus adapters (HBAs) in host servers and ports on the storage system. HBAs are contained in host

servers and serve as ports for connecting the host servers to the storage system. This section describes

how to view I/O rates and transfer rates between host bus HBAs and ports.

Before taking the steps described in the following sections, you need to perform following operations:

1. Perform an XP Performance Control operation (see the HP StorageWorks XP24000/XP20000

Performance Control User Guide).

2. Start the monitoring by Performance Monitor in accordance with the procedure described in

“Starting and Stopping Storage System Monitoring” on page 60 and obtain the traffic data

between host bus HBAs and ports.

Viewing HBA Information

Viewing I/O Rates between HBAs

Performance Monitor monitors traffic between HBAs in the hosts and ports on the storage system, 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. Click the WWN tab).

The tree displays a list of XP Performance Control groups ( ). Below that list, an item named

Not Grouped.

•

To display host bus adapters ( ) in the XP Performance Control group, double-click an XP

Performance Control group.

•

To display host bus adapters ( ) that do not belong to any XP Performance Control group,

double-click Not Grouped.

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 “WWN Tab of the Performance

Monitor Window” on page 49.

5. In the tree, do one of the following:

• To view the I/O rate for host bus adapters in an XP Performance Control group, select the XP

Performance Control group.

Performance Monitor Operations92

1 2 ... 87 88 89 90 91 92 93 94 95 96 97 ... 171 172

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Hp XP Array Manager Software Manuel d'utilisateur Page 92

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Hp XP Array Manager Software Manuel d'utilisateur Page 92

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