Mirror image snapshooting based on virtual machine backup system and backup method

Abstract

The invention provides a mirror image snapshooting based on virtual machine backup system which is used for backing up virtual machine information in a virtual platform. The backup system comprises a backup server, a virtual management module, a mirror image snapshooting module and a snapshot comparison module, wherein the backup server is used for storing backup information of at least one virtual machine; the virtual management module is used for selecting the virtual machines required to be backed up; the mirror image snapshooting module is used for creating snapshots for disk mirror images of the virtual machines; and the snapshot comparison module is used for judging whether backup records of the selected virtual machines exist in the backup server and comparing the existent backup records with the created snapshot information if the backup records exist to store and back up differential information in the backup server. According to the system, the mirror image snapshooting module is utilized for snapshooting the virtual machines as needed, and the differential information is quickly extracted for backup storage when the mirror image snapshots of the virtual machines are not the same as the backup information, so that the utilization efficiency of mirror image storage is improved. Furthermore, the invention provides a backup method.

Description

technical field [0001] The invention relates to virtualization technology, in particular to a virtual machine backup system and backup method based on mirror snapshots. Background technique [0002] At present, with the application of cloud computing virtualization technology more and more widely, a large number of businesses run on virtual machines in cloud data centers. To ensure the reliability of business data, virtual machine image backup, as an important means of protection, has been adopted used by more and more users. The method of virtual machine image backup is generally based on the file system. A large number of files are stored in the local file system. The file system will record the modification time and other attributes of these files. When backing up, the file modification attributes are analyzed to determine whether it should be backed up. . [0003] However, the smallest unit of the file-based backup method is a file, and the disk image file of the virtu...

AI Technical Summary

Problems solved by technology

[0003] However, the smallest unit of the file-based backup method is a file, and the disk image file of the virtual machine is relatively large. Every time the virtual machine is modified, the entire image file will be completely backed up. The backup time is long and takes up a lot of network and storage. resources, and also affects the utilization of the virtual machine

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