Hp XP Array Manager Software Manual do Utilizador descarregar pdf (Página 37)

If you select connected parity groups in the tree, the list displays statistics about disk access

performance for all the connected parity groups.

Note:

When you select a folder icon such as Box 1 or Box 3,the concatenated parity group icon

is displayed in a list. The only parity group ID displayed will be that of the group at the top of

the concatenated parity groups. The icon used for concatenated parity groups is thesameasa

regular parity group icon. There is no speciﬁc icon for concatenated parity groups.

• The Draw button displays a line graph that illustrates changes in the I/O rate, the transfer rate,

etc. The graph can display up to eight lines simultaneously.

• Thelinegraph illustrates changesinthe I/Orate, thetransferrate, etc. Theverticalaxisindicates

the usage rates (in percentage). The horizontal axis indicates dates and/or times.

If you select connected parity groups in the tree, the graph illustrates changes in disk access

performance (for example, the I/O rate and the transfer rate) for all the connected parity groups.

Before clicking the Draw button, you should use the drop-down list at the right corner of the

list (just below the drop-down list for specifying the type of statistics) to specify the type of

information that will be displayed in the graph. The drop-down list to specify the item to be

displayed is shown below.

Figure 1

0 Selecting an Item to be Displayed in the Graph (LDEV Tab)

The items that can be selected in the drop-down list changes depending on the type of statistics

you selected. Some items can be selected only when you select I/O rate (IOPS) or the transfer

rate (MB/s). The items you can select in the drop-down list and the corresponding type of statistics

are shown in Table 4 on page 37.

Table4TheItems YouCan Select in theDrop-Down List andthe TypesofStatistics

(LDEV Tab)

Item selected in the

drop-down list

Meaning

Type of statistics

I/O rate transfer

rate

IO Rate

The I/O rate. The number of I/O accesses per

second).

Read

The number of read accesses per second.

Write

The number of write accesses per second.

Read Hit The read hit ratio.

Write Hit

The write hit ratio.

Back Trans.

Backendtransfer. Thenumber of datatransfers

between the cache memory and the hard disk drive.

Trans.

Thetransferrate. Thesizeofdatatransferred per

second.

: Can be selected (blank): Cannot be selected

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