Spatial extent migration for tiered storage architecture
Provided are techniques for migrating a first extent, determining a spatial distance between the first extent and a second extent, determining a ratio of a profiling score of the second extent to the spatial distance, and, in response to determining that the ratio exceeds a threshold, migrating the second extent.
1. A method, comprising:
dynamically migrating, using a computer including a processor, a first extent from a first storage tier to a second storage tier based on a profiling score of the first extent;
determining a spatial distance between the first extent and a second extent in the first storage tier, wherein the first extent and the second extent are in a same volume;
determining a ratio of a profiling score of the second extent to the spatial distance;
in response to determining that the ratio exceeds a threshold, migrating the second extent.
2. The method of claim 1 , further comprising:
migrating the first extent and the second extent to different storage tiers.
3. The method of claim 1 , further comprising:
migrating the first extent and the second extent to a same storage tier.
4. The method of claim 1 , further comprising:
identifying a list of extents that reside on the same volume as the first extent; and
determining whether each of the extents on the list should be migrated.
5. The method of claim 1 , further comprising:
in response to determining that the ratio does not exceed the threshold, not migrating the second extent.