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IMPLEMENTING OPTIMAL STORAGE TIER CONFIGURATIONS FOR A WORKLOAD IN A DYNAMIC STORAGE TIERING SYSTEM

  • US 20120203999A1
  • Filed: 02/03/2011
  • Published: 08/09/2012
  • Est. Priority Date: 02/03/2011
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • using a computer or processor to perform the steps ofidentifying a first storage tier in a Dynamic Storage Tiering (DST) system with a performance characteristic, where storage space within the first storage tier is accessible via a plurality of logical addresses;

    monitoring the utilization of the first storage tier to detect the placement of a hot spot stored within a continuous range of the plurality of logical addresses;

    logically dividing the continuous range of the plurality of logical addresses into at least a first segment and a second segment so the first segment includes a proportionally larger amount of the hot spot than the second segment; and

    moving the first segment into a second storage tier and retaining the second segment in the first storage tier when the second storage tier has a more desirable performance characteristic than the first storage tier, and moving the second segment into the second storage tier and retaining the first segment in the first storage tier when the second storage tier has a less desirable performance characteristic than the first storage tier.

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