A virtual storage image version management method and system for virtual machines

Abstract

The invention discloses a virtual storage image version management method and system for a virtual machine. The method comprises the following steps of storing metadata and interval block data, wherein the metadata includes a mapping relationship of a physical block number and a logic interval block number of a VSI, a VSI version number, an associated next VSI version number in the time sequence, a version ID, a current version counter, VSI latest version data and VSI historical version data; receiving an operation request on a virtual disk; carrying the VSI version number and the operation type in the operation request; determining the physical block number of the VSI version number; and performing data operation. By dividing a block into interval blocks, the memory overhead can be saved in the version management process.

Description

technical field

[0001] The invention relates to the field of cloud computing, in particular to a virtual storage image version management method and system for virtual machines. Background technique

[0002] As a computing model of service sharing, cloud computing has incomparable advantages over traditional computing models in terms of system deployment, management and maintenance, and security. The cloud computing virtual storage system has a huge storage capacity and can store and process an ever-increasing mass of user data (including operating systems and applications). However, managing massive data is an arduous task, in which building, using, and maintaining storage subsystems are expensive and complex tasks, and building a low-overhead and low-complexity self-managing storage system for cloud computing is a very important issue.

[0003] All user data in cloud computing is stored on the server in the form of a virtual storage image (VSI), such as figure 1 , so the...

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