Hp XP Array Manager Software Manuale Utente Scaricare il pdf (Pagina 70)

• Max.: Indicates the maximum transfer rate for the speciﬁed period. This value is shown in the

list when you select a port icon or host group icon in the tree.

• Response Time: This column indicates the time for replying from the port or host bus adapter when

I/O accessesare made from thehosttothem. Theunitismilliseconds. Theaverage response

time in the period speciﬁed at Monitoring Term is displayed.

Note

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

• Attribute: Indicates the priority of each port. Prio. indicates a prioritized port. Non-Prio. indicates

a non-prioritized port.

Viewing Deta

ils about the I/O and Transfer Rates

To view detai

led information about the I/O rate or the transfer rate for a port:

1. From the drop-down list at the right side of the window, select the type of statistics to be displayed.

•To view I/O rates, select IOPS (I/Os per second) from the drop-down list.

•To view tran

sfer rates, select MB/s (megabytes per second) from the drop-down list.

2. Select the

Subsystem folder in the tree.

3. Select a port from the list.

4. Select the Draw button.

The graph t

hat is not in detail is displayed.

5. Select the Detail check box

The graph contents change as described in Figure 14 on page 42 of

“Port-LUN Tab of the Auto LUN Window”onpage38.

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 s, you need to start monitoring in accordance with the procedure described in

“Starting and Stopping Storage System Monitoring” on page 49 and obtain the usage statistics.

Viewing

LU Path I/O Rates

Perform

ance 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.

Select the Port-LUN tab (Figure 12 on page 39).

The tree displays a list of ports on the storage system.

3. Select IOPS from the drop-down list on the right side of the window.

4. In Monitoring Term, do one of the following:

•To vie

w 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

opti

on, 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

“Vie

wing Port Workload Statistics” on page 41.

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 l

ist on the right displays a list of LU paths and I/O rates (Figure 34 on page 71).

Performance Monitor Operations

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Hp XP Array Manager Software Manuale Utente Pagina 70

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