HP XP P9000 Command View Advanced Edition Software - Manual (Page 77)

Optimizing data placement in a THP/Smart pool
Tasks to complete beforehand:
• A Tiered Storage Manager license must be registered.
• An HP StorageWorks P9000 Performance Advisor software license must be registered (when ref-
erencing performance information).
• Smart pools are being monitored (when referencing Performance Utilization or IOPS for a hardware
tier).
Data placement can be optimized in a THP/Smart pool.
1. From the tree view of the Mobility tab, select THP Pools.
2. Select THP Pool to check for THP/Smart pools whose usage rate, reservation rate, or performance
usage rate is high.
3. If a THP/Smart pool does not meet the expectations for capacity or performance, click the link
of the logical group name in the ranking.
4. Check the usage status of the THP/Smart pools. For Smart pools, also check the usage status and
performance for each hardware tier. Select the THP/Smart volumes that have a problem and
optimize the data placement by clicking:
• the Migrate Data button
• the Edit Tiering Policy button
• the Expand THP Volume button, or other buttons.
5. Select THP Pools from the Mobility tab to check optimization of the data placement.
Data migration
This module describes data migration.
About data migration
Data migration involves moving data from one set of volumes to another set of volumes or THP/Smart
pools, including those in externally-connected storage systems. For example, you can migrate data
when your volume performance decreases or your environment changes. When relocating data based
on the results of performance monitoring for volumes being used by servers and applications, or when
migrating data from an old storage system to a newly set-up storage system, the data in multiple
volumes can be migrated to other volumes or THP/Smart pools.
The source volume can be selected by host or by logical group. The source volume also can be selected
from some of the volumes allocated to a host some of the volumes in a logical group, some of the
volumes in a tier. Migration source volumes can also be selected from volume search results. If a
volume that cannot be migrated is included in the selected volumes, that volume is excluded from
migration and only volumes that can be migrated, will be migrated.
Migration targets are selected from tiers, THP/Smart pools, or resource search results. If THP/Smart
pools are selected, THP/Smart volumes with the same capacity as the migration-source volumes are
automatically created. The existing THP/Smart volumes also can be specified as migration targets.
Note the following:
• When the migration source and the migration target are selected, individual pairs of migration
source volumes and migration target volumes (or THP/Smart pools) are automatically created.
Although, you can change these pairs, pairs of volumes that cannot be migrated will not be created.
User Guide 77