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    • 3. 发明授权
    • Storage system and method for operating storage system
    • 存储系统和操作存储系统的方法
    • US08332600B2
    • 2012-12-11
    • US12289134
    • 2008-10-21
    • Akira ItoEtsutaro AkagawaAtsushi SutohMasanori Takata
    • Akira ItoEtsutaro AkagawaAtsushi SutohMasanori Takata
    • G06F13/00G06F13/28
    • G06F11/1435G06F11/1451G06F11/1453G06F2201/84
    • In acquiring a snapshot, when data in a P-VOL is updated, it is determined whether the same data as target data to be stored in a certain second storage area specified by a certain second address of a D-VOL is already stored in a different second storage area specified by a different second address of the D-VOL, the target data being the differential data generated by the update. When the same data as the target data is stored, the target data is not newly stored in the D-VOL, and the different second address, specifying the different second storage area where the same data is stored, is registered in a snapshot management table (CoW table), in association with a certain first address specifying a certain first storage area where the data from which the target data has been generated is stored.
    • 在获取快照时,当更新P-VOL中的数据时,确定要存储在由D-VOL的某个第二地址指定的某个第二存储区域中的目标数据的相同数据是否已经存储在 由D-VOL的不同第二地址指定的不同的第二存储区域,目标数据是由更新生成的差分数据。 当存储与目标数据相同的数据时,目标数据不是新存储在D-VOL中,并且指定存储相同数据的不同的第二存储区域的不同的第二地址被登记在快照管理表 (CoW表),其与指定已经生成了目标数据的数据的某个第一存储区域的某个第一地址相关联。