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File storage system and file cloning method

  • US 9,116,913 B2
  • Filed: 04/25/2012
  • Issued: 08/25/2015
  • Est. Priority Date: 04/25/2012
  • Status: Expired due to Fees
First Claim
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1. A file storage system, comprising:

  • a file server having a file system controller for controlling a first file system and a second file system;

    a first volume managed by the first file system and storing a first file; and

    a second volume managed by the second file system and storing a second file and a third file, the second file being a replication of the first file for sharing data with the first file until the data stored in the first file is updated, the third file being a virtual file for associating the first file and the second file, wherein;

    the first file has first file identification information set for identifying the first file within the first volume, the second file has second file identification information set for identifying the second file within the second volume, and the third file has third file identification information set for identifying the third file within the second volume;

    the first file has identification information of the second volume and the third file identification information for referring to the third file;

    the second file has the third file identification information for referring to the third file; and

    the third file has identification information of the first volume and the first file identification information for referring to the first file.

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