A virtual machine incremental backup method based on a difference bitmap characteristic of a Qcow2 mirror image file

Abstract

The invention belongs to the technical field of virtual data backup in the field of cloud computing, and particularly relates to a virtual machine incremental backup method based on difference bitmapcharacteristics of a Qcow2 mirror image file. The incremental backup method is implemented based on an incremental backup system. The system comprises a backup client module, a backup client interfacemodule, a backup data read-write module and a backup data preprocessing module. Compared with the prior art, the method has the beneficial effects that (1) backup files can be efficiently generated or downloaded, a backup data special exchange memory partition is arranged in the backup preprocessing module and used for pre-reading or writing backup recovery data, the backup efficiency can be improved, and the method does not depend on a backup agent; And (2) in one backup window, the backup data in each time period is generated into the incremental backup file based on the latest backup difference bitmap, so that the storage space can be saved.

Description

technical field [0001] The invention belongs to the technical field of virtualized data backup in the field of cloud computing, and in particular relates to a virtual machine incremental backup method based on the differential bitmap characteristic of a Qcow2 image file. Background technique [0002] At present, virtualization technology is widely used in government, military, schools, hospitals, enterprises and other institutions to provide information services. Due to the openness of the virtualization environment and the complexity of the network, user data stored on the virtualization system platform and applications are constantly facing security threats. Therefore, how to efficiently protect user data on a virtualization platform has become a hot issue in application virtualization security. [0003] At present, domestic and foreign backup methods for kvm virtualization mainly include the following: [0004] (1) The method based on the internal agent of the operating...

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Problems solved by technology

[0008] (1) Due to the openness of the virtualization environment and the complexity of the network, core important resources are facing security threats

At the same time, the virtualization system and basic software and hardware facilities are basically dominated by foreign manufacturers, and there are huge security risks. Therefore, there are huge security threats to the backup technology of foreign virtualization systems;

[0009] (2) Most domestic virtualization backup technologies require the installation of backup agents on virtual machines, and a large amount of server resources are occupied when performing backup tasks, affecting normal business operations and resulting in low efficiency of backup technologies

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