Hp XP Array Manager Software Manuel d'utilisateur télécharger pdf (Page 37)

data, select shortrange. For details on viewing the usage statistics of external volume groups and

external volumes, see “Viewing Usage Statistics about External Volume Groups” on page 66 and

“Viewing Usage Statistics about External Volumes in External Volume Groups” on page 67.

• You cannot view the ratio of HP StorageWorks XP Business Copy Software processing and so on

to all processing, and the usage statistics about cache memory. For details on the ratio of XP

Business Copy processing and so on to all processing, see the description about the Business Copy

column in “Viewing Usage Statistics about Volumes in Parity Groups” on page 63.

Short-Range Storage

When shortrange is selected, the Auto LUN window displays the statistics collected and stored in

short range. The usage statistics about resources are collected with the interval indicated by Gathering

Interval. The storing period of statistics, which is equivalent to the range of monitoring data that can

be displayed, changes between 8 hours and 15 days depending on the gathering interval.

When shortrange is selected, the Plan button is deactivated. In addition, estimated usage rates of

volumes after migration by XP Auto LUN cannot be displayed.

The usage statistics for a same term might be slightly different between selecting shortrange and

longrange because the monitoring precision of these two interval types differs.

For details on the types of storing period of statistics, see “Understanding Statistical Storage

Ranges” on page 16. For details on the relationship between collection interval and the storing period

of the statistics, see “Monitoring Options Window” on page 52.

LDEV Tab of the Auto LUN Window

When you click Go, Auto LUN / Perf Ctl / Perf Mon and then Auto LUN on the menu bar of the Remote

Web Console main window, Performance Monitor starts and the Auto LUN window is active.

The Auto LUN window includes the LDEV tab, which lets you view statistics about disk access

performance. For example, the window displays the I/O rate (the number of I/Os per second), the

transfer rate (the size of data transferred per second), the average response time for parity groups

and volumes.

For details on how to use this window, see “Monitoring Hard Disk Drives” on page 76.

XP24000/XP20000 Performance Monitor User Guide 37

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Hp XP Array Manager Software Manuel d'utilisateur Page 37