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    • 112. 发明授权
    • Systems and methods for a snapshot of data
    • 数据快照的系统和方法
    • US08010493B2
    • 2011-08-30
    • US12717840
    • 2010-03-04
    • Robert J. AndersonNeal T. FachanEric M. LemarAaron J. PasseyDavid W. RichardsDarren P. Schack
    • Robert J. AndersonNeal T. FachanEric M. LemarAaron J. PasseyDavid W. RichardsDarren P. Schack
    • G06F7/04G06F17/30
    • G06F17/30088G06F17/3015Y10S707/99955
    • In one embodiment, a user or client device is connected to a distributed file system comprised of one or more physical nodes. The data on each of the physical nodes store metadata about files and directories within the file system. Some of the embodiments permit a user to take a snapshot of data stored on the file system. The snapshot may include a single file, a single directory, a plurality of files within a directory, a plurality of directories, a path on the file system that includes nested files and subdirectories, or more than one path on the file system that each includes nested files and directories. In one embodiment, the metadata comprises mini-snapshots for directories representing a path from the root of the file system to the root of the snapshot. The mini-snapshots serve as stand-ins for portions of the file system which are not included in the snapshot, but which permit access to the snapshot data in an intuitive way.
    • 在一个实施例中,用户或客户端设备连接到由一个或多个物理节点组成的分布式文件系统。 每个物理节点上的数据存储有关文件系统内的文件和目录的元数据。 一些实施例允许用户拍摄存储在文件系统上的数据的快照。 快照可以包括单个文件,单个目录,目录内的多个文件,多个目录,文件系统上包括嵌套文件和子目录的路径,或者文件系统上的多于一个路径,每个路径包括 嵌套文件和目录。 在一个实施例中,元数据包括用于表示从文件系统的根到快照的根的路径的目录的小型快照。 微型快照作为文件系统中未包含在快照中的部分的备用,但允许以直观的方式访问快照数据。