HP XP Performance Advisor Software - Manual (Page 282)

Viewing current LDEV assignments for an MP blade
IMPORTANT: This section is applicable only for the P9000 disk arrays.
You can view the LDEVs that are assigned to an MP blade for the duration that you select in the
Chart Work Area. This data helps you to identify the MP blade that is processing requests for an
LDEV. Based on this data, you can perform the necessary action. For example, if your application
using LDEV 00:05 is experiencing a high response time, one of the reasons can be attributed to
the MP blade serving the LDEV 00:05. There might be other consumers using more processor cycles
of the MP blade. In such a case, you can migrate LDEV 00:05 to a less utilized MP blade. You
can choose the LDEVs that you want to migrate to other MP blades based on this data. In case of
imbalanced utilization among two MP blades, where one of them is heavily utilized, you can
choose to migrate the LDEVs that are exerting load on the heavily utilized MP blade to the other
less utilized MP blade.
NOTE: The MP blade-LDEV assignment data is collected every two hours as part of the performance
data collection. This data provides changes in the MP blade-LDEV assignments that occurred over
the last two hours. The following event appears in the Event Log table whenever the MP blade-LDEV
assignment data is collected:
Short update collection: Received MP data for Owner ID 0:33 of Owner Type: LDEV
By default, HP XP P9000 Performance Advisor includes the current MP blade assignment data in
all the performance graphs plotted for an LDEV.
“Current MP blade assignment” (page 282) displays
the LDEV Total IO - Frontend metrics graph for the LDEV 0:33. The Current MP indicates the MP
blade that is currently processing requests for the LDEV 0:33.
Figure 30 Current MP blade assignment
Place the pointer over a particular data point for an LDEV to view the following details:
Example (see Figure 30 (page 282) ) LDEV - MP blade assignment
53036 P9500 Disk Array ID
0:33 cu:ldev ID
LDEV Total IO - Frontend Metric for which you have plotted the performance graph
Drive Type: DKS5B - K146SS Drive type
1933 cu:ldev value
09/03/10, 11:20:00 Date and time stamp
Current MP: MPB-1MA Current MP blade ID (cluster #, blade location)
282 Using charts