Hp XP P9000 Performance Advisor Software Uživatelský manuál Strana 405

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Figure 40 Total I/O Rate Detail
.
The sequential frontend I/Os are when data is read from or written to consecutive addresses. The
random frontend I/Os are when applications address non-consecutive blocks of data. CFWs are a
special class of I/Os generated by HP's P9000 Continuous Access Remote Mirroring software.
NOTE:
If there are no data points available for the dates selected, 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.
Read/Write Ratio report
The Read/Write Ratio report displays in a chart format, the ratio of read activity to write activity, over
the entire period. It is for both sequential and random read, or write activity. Read/Write
Ratio on page 406 displays a sample Read/Write Ratio report for a P9500 Disk Array.
HP StorageWorks P9000 Performance Advisor Software User Guide 405
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