Duplicated data deleting method applicable to cloud backup

A technology of data deduplication and cloud backup, which is applied in the direction of electronic digital data processing, special data processing applications, instruments, etc., can solve the problems of high storage cost, too large backup window, and speed up deduplication, and achieve high data The effect of compression ratio

Active Publication Date: 2010-12-08
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a deduplication method suitable for cloud backup, which reduces the search overhead of duplicate data in the deduplication process, speeds up the deduplication speed, reduces the transmission and storage of backup data, and solves the problem of existing cloud backup systems. Problems with large backup windows and storage overhead

Method used

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  • Duplicated data deleting method applicable to cloud backup
  • Duplicated data deleting method applicable to cloud backup
  • Duplicated data deleting method applicable to cloud backup

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Embodiment Construction

[0031] The subjects involved in the present invention include a local client, a main server and a storage server in a data center. The main server and storage server in the data center constitute the provider of the cloud backup service, and the local client is the user of the cloud backup service. The data of the local client is backed up to the storage server in the data center through the wide area network.

[0032] figure 1 It is a schematic diagram of the overall process of the present invention, specifically:

[0033] (1) The local client accepts the user's backup task request, and the backup task request carries the relevant information of the file to be backed up, including the content of the file, the data volume of the file, the type of the file, the last modification time and the latest backup time, etc.;

[0034] (2) The local client queries the file to be backed up. If the latest modification time of the file is later than the last backup time of the file, it in...

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Abstract

The invention provides a duplicated data deleting method applicable to cloud backup, which mainly comprises there levels of duplicated data deletion. In the first level, duplicated files are primarily deleted according to the modification time and the backup time of the files; in the second level, global file-based duplicated data is deleted; and in the third level, local block-based duplicated data is deleted. The duplicated data deleting method is progressive level by level, achieves excellent balance between data compression ration and duplicated date searching cost and has high ratio of the data compression ration to the searching cost; a large number of duplicated data is deleted within short time, the transmission and the storage of backup data are reduced, and the problems of overlarge backup window and high storage cost in a cloud backup system are solved.

Description

technical field [0001] The invention belongs to the technical field of computer information storage, and in particular relates to a data deduplication method suitable for cloud backup. Background technique [0002] With the rise of cloud computing, providing backup as a service to customers is becoming more and more popular. This backup service is called cloud backup. Compared with traditional backup, cloud backup has many advantages. First of all, the installation, use, and maintenance of cloud backup are easier than traditional backup software. Usually, users only need to install a smart client or plug-in on the modem, and after setting tasks, they can back up file data according to the daily or weekly backup interval. Secondly, as a network service, cloud backup itself solves the problem of remote disaster recovery of data and solves the technical problem of users building a disaster recovery backup system by themselves. At the same time, compared with general backup, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30H04L29/08
Inventor 冯丹谭玉娟田磊许蔚晏志超周国惠
Owner HUAZHONG UNIV OF SCI & TECH
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