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Backup method and device

A backup and incremental backup technology, applied in the direction of response error generation, redundant data error detection in operation, etc., can solve problems such as prolonging backup time and reducing overall backup performance, so as to improve overall performance and shorten backup time. effect of time

Active Publication Date: 2013-04-03
CHENGDU HUAWEI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a backup method and device, which are used to solve the problem that the existing incremental backup method prolongs the backup time and seriously reduces the overall performance of the backup due to the snapshot comparison at the backup time to generate a bitmap

Method used

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Embodiment Construction

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0058] figure 2 It is a schematic flowchart of a backup method provided by Embodiment 1 of the present invention. Such as figure 2 As shown, the methods include:

[0059] 201. At the current incremental backup time, create a snapshot at the current backup time.

[0060] For example, the backup device provided in the embodiment of the present...

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Abstract

The embodiment of the invention provides a backup method and device. The method comprises the following steps of: at the current incremental backup time, creating a snapshot at the current backup time; according to the differential bitmap created at the previous backup time and the snapshot at the current backup time, carrying out the incremental backup; and the differential bitmap being created at the previous backup time, and being updated along with the change in data in a source follower disk before creating the snapshot at the current backup time. The differential bitmap is created at the previous backup time and is updated according to the change in data in the source follower disk between the two backup times, so that the backup can be carried out according to the differential bitmap which is created at the previous backup time and is updated along with the change in data in the source follower disk between the previous backup time and the current backup time, and the bitmap can be generated without snapshot comparison at the current backup time, so that the backup time is shortened, and the overall performance of backup is improved.

Description

technical field [0001] The embodiment of the present invention relates to a backup technology, in particular to a backup method and device. Background technique [0002] For disk backup, the industry generally adopts a snapshot backup method. The advantage of snapshot backup is that it can ensure the consistency of disk data at a certain moment, and the snapshot is also read for backup during backup, which can reduce the impact on the source disk. figure 1 A schematic diagram of a common snapshot-based backup. Such as figure 1 As shown, at the time of backup, take a snapshot of the source disk, the backup server reads the backup data from the snapshot, and at the same time the production server continues to write production data to the source disk. [0003] Backup is mainly divided into full backup and incremental backup. Full backup has a large amount of data, and has high requirements for backup window, backup rate, and backup storage capacity. Incremental backup is d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14
Inventor 张磊
Owner CHENGDU HUAWEI TECH
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