Virtual Machine Incremental Backup Method Based on Differential Bitmap Characteristics of qcow2 Image File

Abstract

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. The incremental backup method is implemented based on an incremental backup system, and the system includes: a backup client module, a backup client interface module, a backup data read-write module, and a backup data preprocessing module; compared with the prior art, the present invention It has the following beneficial effects: (1) It can efficiently generate or download backup files. In the backup preprocessing module, a dedicated swap memory partition for backup data is set for pre-reading or writing backup recovery data, which can improve backup efficiency and not Rely on backup proxy. (2) Within a backup window, the backup data in each time period is based on the latest backup difference bitmap to generate an incremental backup file, so 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...

AI Technical Summary

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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