HP XP P9000 Performance Advisor Software v5.5 User Guide (T1789-96337, Februrary 2013)

Figure 20 10 busiest front end Ports
Related Topics
• “Viewing performance summary” (page 175)
• “Viewing CHIP/CHA data” (page 183)
• “Viewing ACP/DKA data” (page 187)
• “Utilization Summary” (page 181)
• “10 busiest LDEVs/RAID groups” (page 206)
• “RAID Group summary” (page 207)
• “Port summary” (page 209)
• “Viewing LDEV data” (page 212)
Viewing 10 busiest LDEVs and RAID groups
To view the 10 busiest LDEVs and RAID groups associated with an XP or a P9000 disk array's
backend activities, click BackEndIO in the component selection tree for the XP or the P9000 disk
array. The top 10 busiest LDEVs are displayed under the LDEV tab and the top 10 busiest RAID
groups are displayed under the RG (RAID Group) tab. This data is also displayed when you click
the Backend Total Avg group box under the Performance View tab.
If the number of busiest LDEVs or RAID groups are less than ten or if their utilization is zero, only
the busiest components are displayed. The 10 busiest LDEVs selected is based on the backend
transfer rate and the 10 busiest RAID groups selected is based on the Overall % RAID Group
Utilization.
IMPORTANT:
• Under the LDEV tab, you can also view the associated RAID Group for an LDEV. This data
helps determine if more than one LDEV is contributing to a RAID Group activity.
• If the LDEV is a LUSE Master, the details of individual LDEVs are considered for the busiest
components and not the sum of all the individual LDEVs.
The LDEV response time components, AVERAGE READ RESPONSE, MAXIMUM READ RESPONSE,
AVERAGE WRITE RESPONSE, and MAXIMUM WRITE RESPONSE, are measured in milliseconds.
Click an LDEV ID or RAID group name to view the performance graphs for all the associated metrics
in a chart window. To know more about charts, see “Plotting charts” (page 233).
206 Viewing XP and P9000 disk array components