Backup deduplication method of virtual machine

Abstract

The invention relates to the field of cloud computing management technologies, in particular to a backup deduplication method of a virtual machine. The method comprises the steps that firstly, an external snapshot file is created and serves as a virtual machine mirror image file for creating the virtual machine; then, in the backup process, back-end IO read-write of the virtual machine is halted, a corresponding virtual machine mirror image file path is queried through the external snapshot file, a virtual machine mirror image file name is acquired, whether the virtual machine mirror image file exists in a backup path is queried, if not, the virtual machine mirror image file is copied into the backup path, and if yes, a copy of the external snapshot file is stored into the backup path; in the recovery process, back-end IO read-write of the virtual machine is halted, the external snapshot file copy needing to be recovered is searched for according to time points, an external snapshot file used currently is replaced with the copy, and back-end IO read-write of the virtual machine is recovered accordingly. The method solves the problems that backup recovery is large in occupied space, low in efficiency and low in safety, and can be applied to virtual machine backups.

Description

technical field [0001] The invention relates to the technical field of cloud computing management, in particular to a method for virtual machine backup and deduplication. Background technique [0002] In the era of cloud computing, virtual machines replace physical machines as the carrier for running various applications. Compared with a physical machine, it is much easier to perform a full backup of a virtual machine. Since all the data of the virtual machine, including the operating system and user data, can be packaged into one image file, the situation of the physical machine is different, and the data is scattered. distributed across the file system. The steps for virtual machine backup and recovery are generally as follows: [0003] 1. Suspend IO reading and writing on the backend of the virtual machine; [0004] 2. Copy a copy of the virtual machine image file to another file path as a backup, and record the time point when the file copy is completed; [0005] 3. ...

AI Technical Summary

Problems solved by technology

[0008] 1. When backing up, a full copy is generated, the file capacity is large, the time required for backup is long, and the disk space occupied is relatively large;

[0009] 2. Data security is not guaranteed. Since the generation is a full backup, once it is obtained, it can be restored to a virtual machine, and user data will be leaked;

[0010] 3. The recovery time is also longer

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