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    • 1. 发明申请
    • FILE STORAGE SYSTEM AND FILE CLONING METHOD
    • 文件存储系统和文件克隆方法
    • WO2013160942A2
    • 2013-10-31
    • PCT/JP2012/002831
    • 2012-04-25
    • HITACHI, LTD.FUKATANI, TakayukiKAMEI, HitoshiMATSUZAWA, KeiichiIWASAKI, Masaaki
    • FUKATANI, TakayukiKAMEI, HitoshiMATSUZAWA, KeiichiIWASAKI, Masaaki
    • G06F17/30
    • G06F17/30212
    • The present invention enables creation of a clone file of a parent file stored in a different volume or a different storage system, and enables migration of a parent file and a clone file among volumes and storage systems. A file storage performs control to create a virtual parent file having an identifier capable of uniquely identifying a parent file among storage systems and volumes, and to acquire block layout information of the parent file using said identifier. The file storage creates a virtual parent file in the volume in which the clone file is created, and sets the file as a virtual parent file of the clone file so as to enable creation of a clone file of a parent file that exists in a different volume or a different storage system. Moreover, by combining creating the virtual parent file and switching the identifier of the parent file which is pointed by the virtual parent file, migration of clone files and parent files astride storage systems and volumes is enabled.
    • 本发明能够创建存储在不同卷或不同存储系统中的父文件的克隆文件,并且使得能够在卷和存储系统之间迁移父文件和克隆文件。 文件存储器执行控制以创建具有能够在存储系统和卷之间唯一地标识父文件的标识符的虚拟父文件,并使用所述标识符获取父文件的块布局信息。 文件存储在创建克隆文件的卷中创建虚拟父文件,并将该文件设置为克隆文件的虚拟父文件,以便能够创建存在于不同的父文件中的父文件的克隆文件 卷或不同的存储系统。 此外,通过组合创建虚拟父文件并切换虚拟父文件指向的父文件的标识符,启用跨越存储系统和卷的克隆文件和父文件的迁移。