Data stand-by system based on finger print

Abstract

The invention relates to a data backup system based on fingerprints, belonging to the technical field of computer storage backup, which aims at reducing management, storage and network overhead of data backup and improving backup performance. The invention comprises a backup server, a backup agent, a storage server and a Web server which complete data backup and recovery through mutual network communication. The invention is characterized in that redundant data of backup files is recognized with the file segmentation technology based on anchors, thus the invention has the advantages that the modification stability is good and computation cost is low; data segmentations with fingerprints as the index are stored on a plurality of disk arrays of the storage server so as to eliminate backup of redundant data and save disk storage space; the data segmentations are not erased once stored and can be continuously appended on the disk so as to eliminate disk storage fragments; since the effective backup buffer strategy is adopted, the invention also has the advantages of reduced network overhead of backup, increased data backup speed and lowered backup influence to application servers.

Description

technical field [0001] The invention belongs to the field of computer storage backup, and in particular relates to a data backup system. Background technique [0002] In today's information age of knowledge explosion, data is a precious resource for both enterprises and individuals. Data loss can affect the business continuity of the enterprise, causing it to lose a temporary competitive advantage, or it can cause a company to go bankrupt. There are many reasons for data loss, including system software and hardware failures, human error or destruction, and force majeure (natural disasters, wars), etc. In order to protect the data from accidents, the traditional method is to periodically copy the data to removable media such as tapes and optical discs, and then transport them offline to a relatively safe place so that the data can be restored when necessary. It should be pointed out that there are some obvious disadvantages in this traditional data protection method: (1), r...

AI Technical Summary

Problems solved by technology

It should be pointed out that there are some obvious disadvantages in this traditional data protection method: (1), removable storage media such as tapes, optical discs, etc. will wear out or be damaged as time goes by, so that their storage reliability will be reduced, so they are not suitable for storage. Long-term storage medium for data

(2) As a common storage medium for backing up large-capacity data, the reading and writing speed of magnetic tape is often very slow, and because it is a sequential storage device, frequent mechanical rewinding operations usually occur when restoring data. If the backup data is distributed in Time-consuming loading and unloading operations on several tapes

The currently widely used file-based backup technology cannot identify redundant data between files, resulting in more and more duplicate data being backed up to the system, which not only reduces the disk space utilization of the backup system, but also transmits a large amount of data through the network for no reason. Redundant data increases network overhead for data backup and prolongs data backup time

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