HP XP P9000 Performance Advisor Software User Manual
Page 355
If your application is associated with components that belong to the XP disk arrays, the response time
of an LDEV is determined by the performance of the following components that are associated with
that LDEV:
•
Ports (Frontend components)
•
CLPRs (Cache)
•
RAID groups (Backend components)
If your application is associated with components that belong to the P9000 disk arrays, in addition
to the above-mentioned components, an LDEV’s response time is also determined by the average
utilization of the associated MP blades.
The performance data of the LDEVs, ports, CLPRs, RAID groups, and the usage data of the MP blades
(applicable only for the P9000 disk arrays) is displayed on the Troubleshooting screen (“
” on page 362) for a prominent set of metrics that P9000 Performance Advisor supports. In
addition, select additional metrics and view the performance data for these components. Analyzing
performance metrics of LDEVs and the associated components help you to identify the component that
is resulting in the application's high response time, which further enables you to take the necessary
corrective action, such as load balancing across components. For example, one of the reasons for
an application's high response time can be attributed to the heavy IOPS on the port, which is servicing
requests to multiple LDEVs associated with different applications.
IMPORTANT:
•
An application can reside on multiple hosts that connect to the XP and the P9000 disk arrays.
•
A host group can have multiple WWNs to connect to an XP or a P9000 disk array.
•
The data displayed on the Troubleshooting screen only enables your analysis of the issue and
arriving at a probable solution. This screen does not provide a resolution for the issue.
Troubleshooting screen
You can view the performance data of the LDEVs and associated components for an application on
the Troubleshooting screen. This screen appears when you click Troubleshooting > Host Based in the
left pane. “
” on page 362 displays the Troubleshooting screen.
Tasks you can perform on the Troubleshooting screen
•
Associating applications with hosts
•
Removing association between application and hosts
•
Viewing performance or usage data for components
•
Searching for applications associated with components
•
Associating applications and viewing components performance data
The following are the high level steps that you must perform to troubleshoot the performance issues
of components associated with an application:
1.
Select an XP or a P9000 disk array from the component selection tree under Troubleshooting >
Host Based in the left pane.
2.
Associate the application with the respective host that communicates with the disk array. You
can create the association using the host group or WWN of the host. For more information, see
“
Associating applications with hosts
HP StorageWorks P9000 Performance Advisor Software User Guide
355