Extent migration for tiered storage architecture

摘要

A method for data migration between each of a plurality of storage pools in a computing storage environment is provided. Each of the plurality of storage pools is categorized by a metric shared between data segments assigned to any one of the plurality of storage pools. The data segments are prioritized in the any one of the plurality of storage pools based on the metric. A discovery is performed for each of the plurality of storage pools, on a predetermined interval, based on the metric, whether a data segment with a highest priority on a child pool is greater than a data segment with a lowest priority on a parent pool. If so, the data segment with the highest priority on the child pool is promoted to the parent pool. A similar discovery process demotes the data segment with the highest priority on the parent pool to the child pool.