HP P6000 Performance Advisor Software - Manual (Page 29)

For example, if you entered the data retention period as one month on March 31, the data for
March 31 is available only till May 1. On May 1 at 3:30 am, the data for March 31 is
automatically purged. A maximum of 12 months and a minimum of 1 month can be configured.
3 months is the default retention time in HP P6000 Performance Advisor.
State data
State data refers to the management information about an object collected from HP P6000
Command View for the current operational state of the object. For example, virtual disk state data
includes write mode of the virtual disk. Monitoring the state data of an object allows HP P6000
Performance Advisor to track changes to the object state that can impact performance of the object.
By monitoring state data, you can correlate changes in performance of the object with its
corresponding state changes. It will additionally ensure that information about the object state
available in HP P6000 Performance Advisor is synchronized with the actual state in HP P6000
Command View.
If state data monitoring is enabled for an object, HP P6000 Performance Advisor periodically
updates the object state using the latest information from HP P6000 Command View. It is based
on the frequency you configure while adding a storage system for monitoring or editing the
configured settings of an existing storage system. By default, state data collection is enabled for
all performance objects that you add for monitoring. Unlike performance data, state data collection
requires that the HP P6000 Command View instance managing the storage system be part of the
same Management Group where HP P6000 Performance Advisor resides.
You have the option of disabling state data collection for performance objects with the exception
of storage system, controller, and host ports, for which state data collection cannot be disabled.
You can update the state data manually for all performance objects using the Update Object Status
option (Settings
→HP P6000 Performance Advisor instance→Configuration). This action updates
the state of all the performance objects for the selected storage system, irrespective of whether they
are enabled for state data collection. During the process, the state of all the performance objects
is synchronized with their current state in HP P6000 Command View. This is particularly useful
when you have made configuration changes to a storage system or enabled a performance object
for state data monitoring, and want those changes to reflect in HP P6000 Performance Advisor
immediately rather than the next polling cycle. For example, if the state data collection polling
interval is configured as 30 minutes and you cannot wait for that duration, manually update the
state data. For more information on the Update Object Status option, see
“Updating the object
state for a storage system” (page 78) .
Historical state data is not maintained in HP P6000 Performance Advisor. Only the latest state
data is available. State changes to a performance object in HP P6000 Performance Advisor are
not notified through SMTP or SNMP notifications, they are only logged in the Event Log page. The
duration required to complete the synchronization depends on the number of performance objects
monitored in the selected storage system. It also depends on the current host workload. During the
state data synchronization, the existing performance data collection is not paused or impacted.
Polling intervals
HP recommends to choose longer performance data collection polling interval for large configuration
storage systems. It ensures better response from the storage system and also less database growth
rate in HP P6000 Performance Advisor. However, choosing longer polling intervals can result in
loss of granularity of performance data.
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