HP StorageWorks XP Performance Advisor Software v4.6 User and Troubleshooting Guide (T1789-96094, June 2010)

DescriptionScreen ele-
ments
The RG seq frontend reads (IOPS) threshold value indicates the average sequential backend
read tracks that you define an individual RAID group to manage over a specified duration.
XP Performance Advisor uses this value to verify if the average sequential IO/s on each
of the RAID group is within or beyond the set threshold.
Even if one RAID group exceeds the defined threshold, the icon is displayed.
RG Seq Reads
(IOPS)
The RG nonseq frontend reads (IOPS) threshold value indicates the average non sequential
backend read tracks that you define an individual RAID group to manage over a specified
duration. XP Performance Advisor uses this value to verify if the average non sequential
IO/s on each of the RAID group is within or beyond the set threshold.
Even if one RAID group exceeds the defined threshold, the icon is displayed.
RG NonSeq
Reads (IOPS)
The RG writes (IOPS) threshold value indicates the average sequential backend write tracks
that you define an individual RAID group to manage over a specified duration. XP
Performance Advisor uses this value to compare if the average writes (IO/s) on each of
the RAID group is within or beyond the set threshold.
Even if one RAID group exceeds the defined threshold, the icon is displayed.
RG Writes (IOPS)
The RG utilization threshold value indicates the average overall raid group utilization that
you define for an individual RAID group, over an entire collection interval. XP Performance
Advisor uses this value to verify if the average overall raid group utilization of each of the
RAID group is within or beyond the set threshold.
The default threshold value is 50 %.
Even if one RAID group exceeds the defined threshold, the icon is displayed.
RG Util (%)
The DKA util (%) threshold value indicates the average overall utilization of MPs on an
installed DKA. XP Performance Advisor uses this value to verify if the average overall
utilization of each installed DKA is within or beyond the set threshold.
The default threshold value is 70 %.
Even if one DKA exceeds the defined threshold, the icon is displayed.
DKA Util (%)
Viewing Dashboard
XP Performance Advisor displays the overall usage summary of an XP array on the Dashboard screen,
which appears after you log into XP Performance Advisor. If you are on another screen, click Home
in the left pane to view the Dashboard screen. It comprises of the following sections:
DescriptionSections
Displays appropriate icons to depict the status on overall usage summary for XP
arrays. These status icons are displayed under the Frontend, Cache, and Backend
categories. For more information, see “XP array health” on page 107.
XP Array Health
Displays the statistics collected for the Frontend, Cache, or Backend resources,
based on the categories for which you select the status icon in the XP Array Health
section. For more information, see “Dashboard statistics” on page 109.
Statistics (Frontend,
Cache, or Backend)
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