Adaptive Optimization storage tiers
Storage tiers in each Adaptive Optimization configuration are numbered 0, 1, and 2. Tier 0 should be for high-performance storage, Tier 1 for mid-performance storage, and Tier 2 for low-performance storage. It is recommended that storage Tier 0 be used for SSD physical drives, Tier 1 for fast class (FC) physical drives, and Tier 2 for nearline (NL) physical drives. Learn more: Physical drives and device types.
Each Adaptive Optimization configuration on a storage system must have at least two storage tiers. The maximum is three tiers.
Each storage tier corresponds to a common provisioning group, and each common provisioning group can be a member of only one Adaptive Optimization configuration. For information on recommended common provisioning group sizes for tiers, see the Adaptive Optimization for HPE 3PAR Storage technical white paper.
Adaptive Optimization and data movements are based on factors that are tracked by HPE 3PAR System Reporter, such as the amount of space that is available in the storage tiers, the average service times, and the average access-rate densities.
The following space settings can be enabled and disabled for an AO storage tier:
Minimum space – Specifies the minimum size for the common provisioning group in an AO storage tier. AO movements of data between storage tiers will not cause the common provisioning group to fall below this size.
Maximum space – Specifies the maximum size for the common provisioning group in an AO storage tier. AO movements of data between storage tiers will not cause the common provisioning group to exceed this size.