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    • 8. 发明授权
    • Method and system for using overlay manifests to encode differences between virtual machine images
    • 使用覆盖清单来对虚拟机图像之间的差异进行编码的方法和系统
    • US08219592B2
    • 2012-07-10
    • US12040677
    • 2008-02-29
    • Bowen L. AlpernGlenn AmmonsVasanth BalaTodd W. MummertDarrell C. ReimerArun Thomas
    • Bowen L. AlpernGlenn AmmonsVasanth BalaTodd W. MummertDarrell C. ReimerArun Thomas
    • G06F17/30G06F11/00
    • G06F9/45558G06F2009/45562
    • A method for creating a virtual machine image, includes: storing a first image manifest for a first virtual machine image, the first image manifest including a mapping from file names of the first virtual machine image to content descriptors; storing a second image manifest for a second virtual machine image, the second image manifest including a mapping from file names of the second virtual machine image to content descriptors; creating a first overlay mapping by: placing a file name and its content descriptor both from the second image manifest in the first overlay mapping; and placing a file name and its content descriptor both from the first image manifest in the first overlay mapping if the file name and its content descriptor are not mapped in the second image manifest; and constructing a third virtual machine image having an image manifest whose mapping is the first overlay mapping.
    • 一种用于创建虚拟机图像的方法,包括:存储第一虚拟机图像的第一图像清单,所述第一图像清单包括从所述第一虚拟机图像的文件名到内容描述符的映射; 存储第二虚拟机图像的第二图像清单,所述第二图像清单包括从所述第二虚拟机图像的文件名到内容描述符的映射; 通过以下方式创建第一重叠映射:在第一重叠映射中放置来自第二映像清单的文件名及其内容描述符; 以及如果文件名及其内容描述符未被映射到第二映像清单中,则将文件名及其内容描述符从第一映像清单放置在第一重叠映射中; 以及构建具有其映射是第一重叠映射的映像清单的第三虚拟机映像。