Optimizing data placement in a logical group – HP XP Array Manager Software User Manual
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Check the ratio of actual I/O operations to the calculated maximum number of I/O operations
for each hardware tier. Based on this information, you can determine the hardware tiers whose
performance is in a saturated state that then require an optimization operation (such as editing
the tiering policy or data migration).
•
Top 10: Volumes Sharing Tier Capacity
Check the usage ranking of volumes that have the largest use capacity in each hardware tier.
Based on this information, you can check whether data placement is appropriate, for example by
checking whether an unexpected volume is occupying a high-speed drive. This summary only
appears for Smart pools.
•
View Tier Properties
Check the page access distribution per average number of I/O operations, which is based on the
monitoring information of Smart pools.
Based on this information, you can check whether the hardware tier configuration or tiering policy
settings are appropriate.
From the page access distribution for Smart pools, you can narrow the range of displayed items
to only tiering policies or only Smart volumes, as required.
Related topics
Optimizing data placement in a logical group
Data placement can be optimized in either of the supported logical group types (Public Logical Groups
or Private Logical Groups).
Prerequisites
•
A registered Tiered Storage Manager license.
•
A registered HP XP7 Performance Advisor license (when referencing performance information).
1.
From the tree view of the Mobility tab, select Logical Groups.
2.
From Logical Groups, select either Public Logical Groups or Private Logical Groups, and in the
logical group ranking, check for logical groups that are responding late, have a small unused
capacity, or have a large used capacity for each drive type (for example: FMD, SSD, SAS, or
SATA).
3.
If the capacity or performance of the entire logical group is not satisfactory, click the link of the
logical group name to check the total capacity of the volumes and the used capacity of each
drive type (for example: FMD, SSD, SAS, or SATA) within the logical group. If the HP XP7
Performance Advisor license is registered, click the Analyze Performance button to check
performance information as required.
4.
If the balance between the logical group performance and configuration ratio is not satisfactory,
select the row of the target volume, and click Migrate Data, Edit Tiering Policy, or one of the other
buttons to remedy the problem.
5.
Select Logical Groups from the Mobility tab to check optimization of the data placement.
Related topics
• Optimizing data placement in a THP/Smart pool
Optimizing storage performance
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