Block level backup method based on content-addressed storage and system

A content address and backup technology, which is applied in the direction of response error generation, redundant data error detection in operation, etc., can solve the problems of inefficient index query disaster recovery system, etc., reduce the amount of network transmission data, and speed up backup Speed, backup time saving effect

Inactive Publication Date: 2013-10-23
EISOO SOFTWARE
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Problems solved by technology

Inefficient index query will become the bottleneck of the disaster recovery system

Method used

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  • Block level backup method based on content-addressed storage and system
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  • Block level backup method based on content-addressed storage and system

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Embodiment Construction

[0042] The application provides a block-level backup method based on content address storage, which belongs to the technical field of computer information storage and is applicable to all disaster recovery systems based on volume-level CDP technology. The basic idea of ​​the technical solution of this application is: adopt variable-length block algorithm, same block detection technology based on data area and bitmap technology, and realize reduction of storage capacity and network transmission data volume by deduplicating data blocks written on disk And features that save time on backups. The backup process of the present invention includes two stages: the first stage, in combination with the variable-length block algorithm, the fingerprint algorithm and the full bitmap technology, searches for the same block in the disk data area, so that the deduplication of data is more flexible and accurate; the second stage, combined with the variable-length block algorithm, fingerprint a...

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Abstract

The invention discloses a block level backup method based on content address storage, which comprises the steps that A, according to a size and a threshold of a predefined data segment and a source volume state bitmap, and by taking a data block as a unit, and a continuous 1 sequence in the source volume state bitmap as a basis, a source volume data area is segmented, and each single segment is named as a data segment; and B, according to a fingerprint algorithm, a data segment fingerprint is computed, an old fingerprint of each data segment is acquired by querying a fingerprint library, whether each data segment is a repeating data segment or a non-repeating data segment is determined, each non-repeating data segment is transmitted to a storage medium by a network, and the fingerprint library is updated. The invention further provides a client based on the content-addressed storage and a network storage system. With the adoption of the technical scheme, high-efficiency de-duplication can be achieved.

Description

technical field [0001] The present application relates to the technical field of computer information storage, in particular to a block-level backup method and system based on content address storage. Background technique [0002] With the exponential growth of data volume and speed in the information age, the scale of data stored in the disaster recovery system is getting larger and larger. Studies have found that up to 60% of the data stored in application systems is redundant, and more and more redundant data is increasing as time goes by. If not processed, these redundant data will occupy a large amount of network bandwidth during storage to the network, and will also occupy a large amount of storage space afterwards. This is undoubtedly fatal to already very tense network resources. At the same time, the intolerable delay caused by massive data transmission also affects the user experience. Therefore, in order to reduce the load on the IP network, reduce backup bandw...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14
Inventor 李忠文
Owner EISOO SOFTWARE
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