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Method and system for incremental backup of virtual machine data based on Qcow2 snapshots

A technology of incremental backup and virtual machine, which is applied in the direction of data error detection, response error generation, software simulation/interpretation/simulation, etc., which can solve the problems of data incremental backup, not very good, etc. , to achieve the effect of reducing the consumption of time and network bandwidth

Inactive Publication Date: 2014-04-02
OPZOON TECH
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  • Claims
  • Application Information

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Problems solved by technology

How to incrementally back up the data of the virtual machine is a problem that must be solved in cloud computing virtualization, but there is no good method yet

Method used

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  • Method and system for incremental backup of virtual machine data based on Qcow2 snapshots
  • Method and system for incremental backup of virtual machine data based on Qcow2 snapshots
  • Method and system for incremental backup of virtual machine data based on Qcow2 snapshots

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0021] The present invention provides a virtual machine data incremental backup method and system based on qcow2 snapshots, which realize incremental backup of virtual machine data in the field of cloud computing virtualization, and can greatly reduce data backup time and network bandwidth consumption.

[0022] Qemu is an emulated processor widely used on the GNU / Linux platform with source code distributed under the GPL l...

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Abstract

The invention discloses a method and a system for incremental backup of virtual machine data based on Qcow2 snapshots. The method includes the following steps: creating a virtual machine on the basis of a first image file in a qcow2 format, and installing user environment and data; copying the first image file in the qcow2 format into a second image file of the qcow2 format; creating a first snapshot of the first image file of the qcow2 format; operating the virtual machine, and updating the first image file of the qcow2 format; suspending operation of the virtual machine, and creating a second snapshot of the qcow2 format; restoring the operation of the virtual machine; analyzing the first snapshot of the qcow2 format and the second snapshot of the qcow2 format, and combining a difference part between the two snapshots with the second image file of the qcow2 format. Therefore, incremental backup of the data of the virtual machine in the cloud computing virtualization field is realized, and time for data backup and consumption of network bandwidth are reduced substantially.

Description

technical field [0001] The invention relates to the field of virtual machine data backup of a cloud computing network system, in particular to a virtual machine data incremental backup method and system based on qcow2 snapshots. Background technique [0002] Incremental backup means that after a full backup or the last incremental backup, each subsequent backup only needs to back up the data that has been added or modified compared with the previous one. This means that the object of the first incremental backup is the added and modified data generated after the full backup; the object of the second incremental backup is the added and modified data generated after the first incremental backup data, and so on. The most notable advantage of this backup method is that there is no duplicate backup data, so the amount of data backed up is not large, and the time required for backup is very short. How to incrementally back up the data of the virtual machine is a subject that mus...

Claims

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Application Information

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IPC IPC(8): G06F11/14G06F9/455
Inventor 徐安
Owner OPZOON TECH
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