Viewing current ldev assignments for an mp blade, Viewing current ldev assignments – HP XP Performance Advisor Software User Manual
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Viewing current LDEV assignments for an MP blade
IMPORTANT:
This section is applicable only for the P9500/XP7 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 XP7 Performance Advisor includes the current MP blade assignment data in all the
performance graphs plotted for an LDEV.
“Current MP blade assignment” (page 283)
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 32 Current MP blade assignment
Place the pointer over a particular data point for an LDEV to view the following details:
Example (see
)
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)
Plotting charts 283