Reducing energy consumption and optimizing workload and performance in multi-tier storage systems using extent-level dynamic tiering

A computer program product comprising a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising:

• computer readable program code configured to receive data access information of a storage extent stored in a storage system and utilization information of storage devices in the storage system, wherein the storage system comprises a plurality of storage tiers and each of the plurality of storage tiers comprises a plurality of storage devices;
• computer readable program code configured to estimate storage resources required for each of the plurality of the storage tiers to satisfy the storage extent's performance and capacity requirements, wherein estimation of said storage resources is based on said data access information;
• computer readable program code configured to determine which one of the plurality of storage tiers would incur the lowest power consumption to the storage system for satisfying the storage extent's performance and capacity requirements, wherein said one storage tier is determined by calculating the amount of power that would be consumed by the storage extent in each of the plurality of storage tiers based on said estimated storage resources;
• computer readable program code configured to determine at least one storage device (among the plurality of storage devices) in said one storage tier that has available storage resources that would satisfy the storage extent's performance and capacity requirements, wherein said determination of said at least one storage device is based on said data access information and utilization information;
• and
• computer readable program code configured to allocate the storage extent to said one storage tier and to one storage device (among the at least one storage device) that has the least amount of available storage capacity.

A system, comprising:

• a data collector that receives data access information of a storage extent stored in a storage system and utilization information of storage devices in the storage system, wherein the storage system comprises a plurality of storage tiers and each of the plurality of storage tiers comprises a plurality of storage devices;
• a resource consumption module that estimates storage resources required for each of the plurality of the storage tiers to satisfy the storage extent's performance and capacity requirements, wherein estimation of said storage resources is based on said data access information;
• a placement module that:
• determines which one of the plurality of storage tiers would incur the lowest power consumption to the storage system for satisfying the storage extent's performance and capacity requirements, wherein said one storage tier is determined by calculating the amount of power that would be consumed by the storage extent in each of the plurality of storage tiers based on said estimated storage resources, and
• determine at least one storage device (among the plurality of storage devices) in said one storage tier that has available storage resources that would satisfy the storage extent's performance and capacity requirements, wherein said determination of said at least one storage device is based on said data access information and utilization information;
• and
• a migrator that allocates the storage extent to said one storage tier and to one storage device (among the at least one storage device) that has the least amount of available storage capacity.