HP XP Array Manager Software - Manual (Page 43)

Data mobility
An administrator can obtain information required to see the operating status of storage resources and
optimize data placement.
About data mobility
The Mobility tab provides information required to see the operating status of storage resources and
optimize data placement.
To efficiently use a storage resource, use the Mobility tab to optimize the data arrangement. In the
Mobility tab, information used to determine whether the data arrangement is appropriate is collectively
displayed. In addition, you can use the Mobility tab to centrally perform operations regarding moving
data such as data migration. To use the Mobility tab, you must first register a Tiered Storage Manager
license.Using Mobility tab information, you can evaluate and analyze whether the hardware tiers are
being used appropriately and whether the volumes are providing the expected performance. Based
on these results, you can optimize data placement by migrating data and setting up an Smart Tiers
Software tiering policy (which specifies the hardware tiers in which volumes are to be placed). After
completing these operations, check their effect from the Mobility tab and then perform any other
necessary data optimization operations. By repeating this process, the placement of data can be
optimized. The following figure shows the process of optimizing data placement.
From the Mobility tab, data placement can be optimized from either the application (logical group)
perspective or from the THP pool perspective.To respond to requests from host or application
administrators, or to confirm whether Smart Tiers Software pools and storage resources are being
used according to the needs of each application, check the balance between the performance and
the configuration ratio of logical groups.To regularly monitor storage resources, or if there is a problem
in the analysis of logical groups, check the balance between the performance and the configuration
ratio of each THP pool. If there is a problem, you must check the operating status of each volume in
the THP pool and then optimize the configuration.
When periodically monitoring logical groups or THP pools during routine work, check the ranking
reports in the Mobility tab so you can efficiently find logical groups or THP pools that have problems
in their operational status.
The Mobility tab can be used to check the total capacity and usage rate for each logical group, THP
pool, or each volume in a logical group or THP pool. As with Smart Tiers Software pools, you can
also check which volumes are using a the largest proportions of each hardware tier. In addition, the
following performance information can also be viewed:
• Quantity of I/O operations compared to the calculated maximum number of I/O operations
In addition, if linked with HP StorageWorks P9000 Performance Advisor software, the following
performance information can be viewed (see HP P9000 Command View Advanced Edition Suite
Software Administrator Guide):
• IOPS throughput for THP pools, volumes, and hardware tiers
• Past volume performance data (to look for trends)
User Guide 43