View Ldev Summary - HPE XP7 User Manual

Screen element
Avg Read Resp (msec)
Max Read Resp (msec)

View LDEV summary

PA displays the following data by default on the Summary View LDEV screen for all the LDEVs that
belong to an XP or an XP7 disk array:
• Resource Group
• LDEV ID
• RG
• ACP Pair Id
• CHIP Port
• Host Group
• LDEV IO/s- Frontend
• Avg Read Resp (msec)
• Avg Write Resp (msec)
• MP Blade ID
IMPORTANT:
Since, the CHIP/CHA and ACP/DKA MPs are moved to the MP blades in the P9500/XP7 disk
arrays, their MP utilization metrics are not applicable for the P9500/XP7 disk arrays. For more
information, see View MP Blade utilization summary for XP7 disk arrays on page 200.
You can query the existing performance data in PA for a particular date and time stamp to view the
corresponding point in time data for all the LDEVs. By default, the data displayed is for the last
performance data collection time stamp and sorted in a descending order. The sorting of data is based on
the average read response time of individual LDEVs. You can query the LDEV data for a different date
and time stamp and also sort the data based on a different sort type. For more information, see Query
and sort LDEV data on page 216.
By default, the values displayed for the following are based on the performance values of all the LDEVs
that are displayed for the last collection time stamp:
• Total IOs: The total Frontend I/Os handled by the selected XP or XP7 disk array.
• Total MBs: The total Frontend throughput in MB/s managed by the selected XP or XP7 disk array.
• Total Tracks: The total tracks on the selected XP or XP7 disk array.
After you query for the LDEV data, the above-mentioned total values are updated accordingly, where they
are calculated based on the performance values of all the LDEVs retrieved for the specified date and time
stamp. For example, if 100 LDEV records are displayed by default for the last collection time stamp, the
total values for the above-mentioned fields are calculated based on the performance values of all the 100
Description
Average read response time of all the journal LDEVs created in a
specified RAID Group over the entire data collection interval.
Maximum read response time of all the journal LDEVs created in
a specified RAID Group over the last 30 seconds of the collection
interval.
View LDEV summary 215