HP 3PAR System Reporter Software - Manual (Page 274)

9.2 Overview
3PAR System Reporter User’s Guide System Reporter 2.8
and tier 2 is the slowest. Tiers are defined by Common Provisioning Groups (CPGs) and all of
the cost and performance characteristics of the tier are determined by the setting of the CPG,
such as the RAID level, number of disks used, disk type and speed. You can also control the
maximum space available for each tier. See section 9.3.1 Tier Definition (CPG Name and GiB) on
page 9.6 for more details.
In addition to the space available for the tiers, you can also differentiate configurations by an
Adaptive Optimization mode described in 9.3.4 Adaptive Optimization Mode on page 9.10.
You must also specify the schedule (the dates, weekdays and hours) when the configuration
will execute (see 9.3.2 Schedule on page 9.9) as well as the number of hours of data prior to
the execution time that the analysis should consider for optimization purposes (see 9.3.3
Measurement Hours on page 9.9).
The analysis for an Adaptive Optimization configuration first calculates the space available in
each CPG (tier). It then calculates the access rate (IO accesses/(GiB * minute)) over the
measurement interval (specified in the configuration) for all the VV regions in the CPGs for a
configuration as well as the average access rates for each CPG (tier). Based on the space
available in each tier, and the performance of each region in comparison with the averages for
each of the tiers, the data is moved from one tier to the other as applicable using a CLI
program (mvrg).
System Reporter can generate a number of different reports that you can use to track storage
utilization and monitor the movement of data performed by Adaptive Optimization. See 5.3
Creating Custom Reports on page 5.4 for details on generating reports.
NOTE: Adaptive Optimization analyzes each configuration independent of the
other configurations. Only the space available in each tier of the configuration
and the relative access rates of the regions in the tiers (CPGs) of the configuration
matter. Of course, there may be indirect influences from other configurations. For
example, if CPGs from two configuration use the same PDs, then space used by a
CPG in one configuration may cause less space to be available for the CPG in the
other configuration.