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Efficient storage load redistribution

  • US 8,924,676 B1
  • Filed: 06/29/2011
  • Issued: 12/30/2014
  • Est. Priority Date: 06/29/2011
  • Status: Active Grant
First Claim
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1. A method of redistributing files stored on a set of storage devices, the method comprising:

  • receiving, by controlling circuitry within a controller, a load balancing tolerance value which identifies a target difference between a load on a most-loaded storage device and a load on a least-loaded storage device of the set of storage devices, a load on a storage device representing an amount of consumed storage space on the storage device;

    generating, by the controlling circuitry, a file transfer plan based on (i) a file size of each file stored on the set of storage devices, (ii) a load on each storage device of the set of storage devices and (iii) the load balancing tolerance value; and

    transferring, by the controlling circuitry, files between storage devices according to the file transfer plan to redistribute the files stored on the set of storage devices;

    wherein the load balancing tolerance value is greater than zero; and

    wherein the target difference is a number specified by a user representing a maximum difference tolerable to the user.

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