Tiered caching and migration in differing granularities

摘要

For data processing in a computing storage environment by a processor device, the environment incorporating at least high-speed and lower-speed caches, and managed tiered levels of storage, groups of data segments are migrated between the tiered levels of storage such that clumped uniformly hot ones of the groups of data segments are migrated to use a Solid State Drive (SSD) portion of the tiered levels of storage; uniformly hot groups of data segments are determined using a first, largest granulated, heat map for a selected one of the group of the data segments; a second heat map, which is smaller than the first and having the largest granularity of the first heat map, is used to determine the clumped hot groups; and sparsely hot groups are determined when neither the first heat map nor the second heat map are hotter than the first and second predetermined thresholds, respectively.

主权项

1. A method for data processing in a computing storage environment by a processor device, the computing storage environment incorporating at least high-speed and lower-speed caches, and tiered levels of storage, the method comprising:
migrating groups of data segments between the tiered levels of storage such that clumped uniformly hot ones of the groups of data segments are migrated to use a Solid State Drive (SSD) portion of the tiered levels of storage; determining the uniformly hot groups of data segments using a first heat map for a selected one of the group of the data segments, the heat map having a first, largest granularity; determining the clumped hot groups of data segments using a second heat map having a granularity smaller than the first, largest granularity of the first heat map; and determining the sparsely hot groups of data segments by determining that neither the first heat map nor the second heat map are hotter than the first and second predetermined thresholds, respectively.