Hp XP Array Manager Software Manuale Utente Scaricare il pdf (Pagina 52)

The listonthe rightdisplaysusage statistics aboutvolumes in the speciﬁed parity group

(Figure 21 on page 52). The displayed statistics are the average and the maximum usage rates

for the period speciﬁed in the From and To boxes.

Notes:

• If you change the date and time in the From and To boxes and then click the Apply button,

Performance Monitor recalculates usage rates and updates information in the list. To change

the date and time in From and To boxes, use the arrow buttons and the sliders (for details,

see “Auto LUN Window, Physical Tab” on page 29).

• If an exclamation mark (!) is displayed before a usage rate, the reported volume usage rate

is likely to be inaccurate, because the conﬁguration has changed (for example, volumes have

been moved by Auto LUN or Business Copy, or formatted by Virtual LVI or Open Volume

Management).

• If a plus mark (+) is displayed before a usage rate 0, such as +0,the usagerateisnot

completely 0 but less than 1.

6. To display a graph that illustrates changes in usage rate for volumes, select the desired volumes

in the list and then click the Draw button.

Note:

The range of monitoring and the gathering interval affects the time period represented by

a graduation on the horizontal axis.

When selecting longrange for storing period of statistics:

When selecting shortrange for storing period of statistics:

Note:

It is possible that the sum of the usage rate for each volume in a parity group is not equal to the

usage rate for that parity group (see “Viewing Usage Statistics about Parity Groups” on page 50). This is

because the Auto LUN window rounds off fractions below the decimal point to the nearest whole number

when displaying the usage rate for each volume.

Figure 21 Examples of Volume Usage Rates Displayed

The list displays the following items:

•

: When the green checkmark icon is displayed on the left of a volume, the graph illustrates

changes in usage rate for the volume.

• LDEV: This column indicates volumes (LDEVs). The number on the left of the ﬁrst colon from the left

is th

e LDKC number. The number on the left of the second colon from the left is the CU image

numb

er. The number on the right of the second colon is the LDEV number.

• Emulation: This column indicates device emulation types.

• Usage:

•The

Ave. (Total) column displays the average usage rate in the speciﬁed period.

•The Max. column displays the maximum usage rate in the speciﬁed period.

• Read Rate:

Performance Monitor Operations

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 128 129

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Hp XP Array Manager Software Manuale Utente Pagina 52

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