Thinly provisioned flash cache with shared storage pool
AssigneeInternational Business Machines Corporation
InventorsMichael T. Benhase, Lokesh M. Gupta, Karl Nielsen
Life of this patent
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Abstract
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 managed tiered levels of storage, a Solid State Device (SSD) tier is variably shared between the lower-speed cache and the managed tiered levels of storage such that the managed tiered levels of storage are operational on large data segments, and the lower-speed cache is allocated with the large data segments, yet operates with data segments of a smaller size than the large data segments and within the large data segments.
Claims5
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 managed tiered levels of storage, the method comprising:
- variably sharing a Solid State Device (SSD) tier between the lower-speed cache and the managed tiered levels of storage such that the managed tiered levels of storage are operational on large data segments, and the lower-speed cache is allocated with the large data segments, yet operates with data segments of a smaller size than the large data segments and within the large data segments;
- configuring the SSD tier for caching those of the large data segments determined to be uniformly hot by determining that a heat map is hotter than a predetermined threshold;
- wherein if selected data segments are cached in the lower-speed cache and are determined to become uniformly hot, migrating the selected group from the lower-speed cache to the SSD tier while refraining from processing data retained in the lower-speed cache until the selected group is fully migrated to the SSD tier.
Dependencies are inferred from the claim text.