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STORAGE SYSTEM AND DATA MANAGEMENT METHOD

  • US 20100049754A1
  • Filed: 10/01/2008
  • Published: 02/25/2010
  • Est. Priority Date: 08/21/2008
  • Status: Abandoned Application
First Claim
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1. A storage system comprising:

  • a storage apparatus, which stores a volume that stores, for one or more files, a file system comprising real data and metadata that comprises the update time information of the files, and which receives a block write request that specifies a block of the volume; and

    a file server, which receives from a computer a file write request that specifies a file, specifies a block of the volume in which the file specified by the file write request is stored, and sends a block write request that specifies the block of the specified volume to the storage apparatus,wherein the file server has a write processing unit, which reads from the volume the metadata of all files included in the file system at a plurality of base points-in-time serving as bases for the restoration of the volume, and which sequentially writes all the read-in metadata to a prescribed difference data storage volume of the storage apparatus, andthe storage apparatus has a difference data save processing unit, which, upon receiving the block write request from the latest base point-in-time to the subsequent base point-in-time, chronologically writes the data stored in the block specified by the block write request to a storage area subsequent to the storage area in which the metadata of the difference data storage volume has been written.

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