Hp XP P9000 Performance Advisor Software Uživatelský manuál Strana 403

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Figure 38 Total I/O Rate
.
The total backend transfers may be compared to the total frontend I/Os and the difference is due to
the effects of the array cache. The total backend transfers load is taken by the RAID groups and
ACP/DKA pairs, where as the total frontend I/O load is taken by the CHIP/CHA ports.
NOTE:
If there are no data points available for the dates selected, a blank chart is displayed. If all the data
values are zero for the dates selected, a chart with a horizontal line along X axis is displayed in the
center of the chart.
Total I/O Rate by hour of day report
The Total I/O Rate by hour of day report displays in a chart format, the number of total read and
write I/O operations per second over the over 24-hour period. Total I/O Rate by hour of
day on page 404 displays a sample Total I/O Rate by hour of day report for a P9500 Disk Array.
HP StorageWorks P9000 Performance Advisor Software User Guide 403
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