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    • 2. 发明申请
    • Access to Data for Virtual Devices
    • 访问虚拟设备的数据
    • US20100050170A1
    • 2010-02-25
    • US12195763
    • 2008-08-21
    • Roopak ParikhKiran JoshiSirish RaghuramKarthik Sreenivasa MurthyVasani Soam Snehal
    • Roopak ParikhKiran JoshiSirish RaghuramKarthik Sreenivasa MurthyVasani Soam Snehal
    • G06F9/455
    • G06F9/45537
    • One embodiment of the present invention is a method for a virtual machine to access data from a virtual device, the method including: (a) attaching the virtual device to the virtual machine with a backing store that is a virtual image of a file system conforming to a predetermined file system format, wherein: (i) file system data is stored in one or more files, (ii) the virtual image includes metadata stored apart from the file system data, which metadata corresponds to the predetermined file system format, (iii) the metadata includes one or more directory records, and (iv) the one or more directory records include information that points directly or indirectly to the file system data; (b) issuing a read request for a block of data from the file system as if stored in the predetermined file system format; (c) accessing the metadata and determining the location of the requested block of data in the file system data; and (d) retrieving the requested block of data from the file system data.
    • 本发明的一个实施例是一种用于虚拟机从虚拟设备访问数据的方法,所述方法包括:(a)使用作为符合文件系统的虚拟映像的后备存储将虚拟设备附接到虚拟机 其中:(i)文件系统数据被存储在一个或多个文件中,(ii)虚拟图像包括与文件系统数据分开存储的元数据,该元数据对应于预定的文件系统格式( iii)元数据包括一个或多个目录记录,以及(iv)一个或多个目录记录包括直接或间接地指向文件系统数据的信息; (b)从文件系统发出对数据块的读取请求,如同以预定的文件系统格式存储; (c)访问元数据并确定所请求的数据块在文件系统数据中的位置; 和(d)从所述文件系统数据中检索所请求的数据块。
    • 3. 发明授权
    • Access to data for virtual devices
    • 访问虚拟设备的数据
    • US08819674B2
    • 2014-08-26
    • US12195763
    • 2008-08-21
    • Roopak ParikhKiran JoshiSirish RaghuramKarthik Sreenivasa MurthyVasani Soam Snehal
    • Roopak ParikhKiran JoshiSirish RaghuramKarthik Sreenivasa MurthyVasani Soam Snehal
    • G06F9/455
    • G06F9/45537
    • One embodiment of the present invention is a method for a virtual machine to access data from a virtual device, the method including: (a) attaching the virtual device to the virtual machine with a backing store that is a virtual image of a file system conforming to a predetermined file system format, wherein: (i) file system data is stored in one or more files, (ii) the virtual image includes metadata stored apart from the file system data, which metadata corresponds to the predetermined file system format, (iii) the metadata includes one or more directory records, and (iv) the one or more directory records include information that points directly or indirectly to the file system data; (b) issuing a read request for a block of data from the file system as if stored in the predetermined file system format; (c) accessing the metadata and determining the location of the requested block of data in the file system data; and (d) retrieving the requested block of data from the file system data.
    • 本发明的一个实施例是一种用于虚拟机从虚拟设备访问数据的方法,所述方法包括:(a)使用作为符合文件系统的虚拟映像的后备存储将虚拟设备附接到虚拟机 其中:(i)文件系统数据被存储在一个或多个文件中,(ii)虚拟图像包括与文件系统数据分开存储的元数据,该元数据对应于预定的文件系统格式( iii)元数据包括一个或多个目录记录,以及(iv)一个或多个目录记录包括直接或间接地指向文件系统数据的信息; (b)从文件系统发出对数据块的读取请求,如同以预定的文件系统格式存储; (c)访问元数据并确定所请求的数据块在文件系统数据中的位置; 和(d)从所述文件系统数据中检索所请求的数据块。