HP 3PAR StoreServ 7400 2-node HP 3PAR System Reporter 3.1.0 Software User& - Page 180
Using Adaptive Optimization, Overview
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8 Using Adaptive Optimization If you have an Adaptive Optimization license, you can use the Adaptive Optimization feature in conjunction with System Reporter to optimize storage utilization across multiple tiers. NOTE: Adaptive Optimization in System Reporter 3.1 is supported only by HP 3PAR OS versions 2.3.1 MU 1 through 3.1.1. For HP 3PAR OS versions 3.1.2 and later, Adaptive Optimization is implemented within HP 3PAR OS. Overview Adaptive Optimization analyzes sub-volume, region level disk access rates for a given array over a scheduled period of time and then performs a data migration of regions between tiers according to a cost versus performance preference. Disk utilization is optimized by having frequently accessed data moved to the higher performance tier (e.g., RAID 1 using Solid State Disks or SSDs) while infrequently accessed data is moved to the lower cost tier (e.g., RAID 6 on Nearline disks). By using Adaptive Optimization, you can achieve a much higher degree of control over disk usage by reserving your faster and more expensive storage resources for the data that is frequently accessed and relegating your slower and less expensive drives to storing data that is only occasionally accessed. Multiple Adaptive Optimization configurations can be defined for an HP 3PAR StoreServ Storage array where each corresponds to a related set of hosts or applications that require optimization. You can assign either two or three storage tiers (defined through tiers numbered 0, 1 and 2) for data migration in a given configuration where tier 0 is the fastest, tier 1 is the intermediate speed, 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 "Tier Definition (CPG Name and GiB)" (page 182) section for more details. In addition to the space available for the tiers, you can also differentiate configurations by an Adaptive Optimization mode described in "Adaptive Optimization Mode" (page 185). You must also specify the schedule (the dates, weekdays and hours) when the configuration will execute (see "Schedule" (page 184)) as well as the number of hours of data prior to the execution time that the analysis should consider for optimization purposes (see "Measurement Hours" (page 184)). 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). 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. 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 "Creating Custom Reports" (page 65) for details on generating reports. 180 Using Adaptive Optimization