Please download the dossier by clicking on the dossier button x
×

STORAGE SYSTEM FOR ELIMINATING DUPLICATED DATA

  • US 20110191305A1
  • Filed: 09/18/2009
  • Published: 08/04/2011
  • Est. Priority Date: 09/18/2009
  • Status: Active Grant
First Claim
Patent Images

1. A storage system, comprising:

  • a communication interface device (207) that is coupled to a communication network (102) to which a client (101) is coupled;

    a storage device (209) in which user data written/read to/from the client is stored; and

    a controller (202) that is coupled to the communication interface and the storage device,wherein when receiving a write request from the client, the controller carries out a first de-duplication process and thereafter carries out a second de-duplication process at an appropriate time,in the first de-duplication process, the controller determines whether a write target data item, which is a write target user data item, overlaps with any of stored data items of a part of a stored data item group, which is a user data item group stored in a storage device, and does not store the write target data item in the storage device when a result of the determination is positive, andin the second de-duplication process, the controller determines whether a target stored data item, which is not finished with an evaluation of whether or not it overlaps with the stored data item in the first de-duplication process, overlaps with another stored data item, and deletes the target stored data item or the same data item overlapping with the target stored data item from the storage device, when a result of the determination is positive.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×