HP StorageWorks Performance Advisor XP Software user guide (T1789-96025, October 2007)

NOTE:
If there are no data points ava ilable for the dates selected, blank chart will be displayed. If all the data
values are zero for the dates selected, a chart with a horizontal line along X axis will be displayed in
the center.
Total I/O R ate Detail report
The Total I/O Rate D etail report shows in a chart format, the number of Sequential I/O, Random I/O,
and CFW I/O operations per second, over the entire data collection p eriod. Total I/O Rate Detail shows
a sample Total I/O Rate Detail report for XP1024.
Figure 60 Total I/O Rate Detail
Sequential I/Os are when data is read from or written to consecutive addresses. Random I/Os are when
applications address non-consecutive blocks of data. CFWs are a special class of I/Os generated by
HP’s Continuous Access remote mirroring software.
NOTE:
If there are no data points ava ilable for the dates selected, blank chart will be displayed. If all the data
values are zero for the dates selected, a chart with a horizontal line along X axis will be displayed in
the center.
Read/Write Ratio report
The Read/Write Ratio report shows in a chart format, the ratio of read activity to write activit y, over the
entire data collection period. Th is is for both sequential and random read/write activity. Read/Write
Ratio shows a sample Read/Write Ratio report for XP1024.
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