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AssigneeFujitsu Limited
InventorsDaisuke Fujita, Eiji Hamamoto, Hisashi Osanai, Shunsuke Motoi, Shuko Yasumoto, MASANORI FURUYA
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A storage controller that generates multiple versions of a snapshot of a storing device and that includes a first calculator that counts a first number of segments updated in a first snapshot that is to be deleted among the multiple versions of the snapshot but not updated in a second snapshot of a successive version to the first snapshot, a second calculator that counts a second number of segments updated in the second snapshot, and a determining processor that determines, when the first number is the second number or more, that the second snapshot and the first snapshot are a merging source and a merging destination in merging processing, respectively, and determines, when the first number is less than the second number, that the first snapshot and the second snapshot are the merging source and the merging destination, respectively, the merging source being merged into the merging destination.
A storage controller that generates a plurality of versions of a snapshot of a storage device, the storage controller comprising:
A non-transitory computer-readable recording medium having stored therein a controlling program for causing a computer included in a storage controller that generates a plurality of versions of a snapshot of a storage device to execute a controlling process comprising:
A method for controlling performed in a storage controller that generates a plurality of versions of a snapshot of a storage device, the method comprising:
Dependencies are inferred from the claim text.