×

Data migration between multiple tiers in a storage system using pivot tables

  • US 8,006,061 B1
  • Filed: 04/11/2008
  • Issued: 08/23/2011
  • Est. Priority Date: 04/13/2007
  • Status: Active Grant
First Claim
Patent Images

1. A method for migrating data between tiers of a storage system, the method comprising:

  • subdividing a storage capacity of the storage system into a set of territories;

    grouping the set of territories into tiers;

    imposing an ordering on the tiers;

    maintaining an information lifecycle management metric for each territory;

    grouping a range of all possible information lifecycle management metrics into buckets, each bucket corresponding to one of the tiers;

    establishing, for each tier and corresponding bucket, counts of territories grouped in the tier and having the information lifecycle management metric within the corresponding bucket;

    promoting a territory from a lower tier to a higher tier in response to the information lifecycle management metric associated with the territory being within the bucket associated with the higher tier; and

    demoting a territory from a higher tier to a lower tier in response to the information lifecycle management metric associated with the territory being within the bucket associated with the lower tier.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×