| 摘要 |
A method, system and computer program product for storing data of a Virtual Execution Environment (VEE), such as a Virtual Private Server (VPS) or a Virtual Machine, including starting an operating system running a computing system; starting a Virtual Machine Monitor under control of the operating system, wherein the VMM virtualizes the computing system and has privileges as high as the operating system; creating isolated Virtual Machines (VMs), running on the computing system simultaneously, wherein each VM executes its own OS kernel and each VM runs under the control of the VMM; starting a storage device driver and a file system driver in the operating system; mounting a virtual disk drive; starting VM-specific file system drivers in the VM, the VM specific file system driver together with the common storage device drivers support virtual disk drives, the virtual disk drive is represented on the storage device as a disk image, the disk image data are stored on the storage device as at least one file that includes user data storage blocks and redirection blocks, the redirection blocks point to user data storage blocks, the redirection blocks have a multilevel hierarchy, and the internal structure is used by the VM-specific file system driver.
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