HP XP P9500 Storage - Manual (Page 64)

Tier monitoring and data relocation
Smart Tiers uses tiers to manage data storage. It classifies the specified drives in the pool into tiers
(storage hierarchy). Up to three tiers can be defined in a pool depending on the processing capacity
of the data drives. Tiering allocates more frequently accessed data to the upper tier and less
frequently accessed data, stored for a long period of time, to the lower tier.
Smart Pool
With Smart Tiers, you can enable the Smart Pool option for an existing pool. The default is to allow
tier relocation for each THP V-VOL. Only the THP V-VOLs for which tier relocation is enabled are
subject to calculation of the tier range value, and tier relocation will be performed on them. If tier
relocation is disabled for all THP V-VOLs in a pool, tier relocation is not performed.
Figure 4 Relationship between Smart Pool and tier relocation
Tier monitoring and relocation cycles
Performance monitoring and tier relocation can be set to execute in one of two execution modes:
Auto and Manual. You can set up execution modes, or switch between modes by using either
Remote Web Console or RAID Manager.
In Auto execution mode, monitoring and relocation are continuous and automatically scheduled.
In Manual execution mode, the following operations are initiated manually.
•
Start monitoring
•
Stop monitoring and recalculate tier range values
•
Start relocation
•
Stop relocation
64 Configuring thin provisioning