System and method for remote wide area network disaster recovery backup

Abstract

The invention discloses a system and method for remote wide area network disaster recovery backup. The method comprises the steps that when data transmission is conducted on each file data stream, whether a file data stream identical to a current file data stream is transmitted or not is identified by a data storage server on one node; if yes, an index of the current file data stream is directly pointed to the same transmitted file data stream, the current file data stream is deleted, and it is determined that the stored unique file data stream is sent to a data center server; the file data stream obtained is received by the data center server after repeated data deletion is conducted on the data storage sever of one node and is transmitted to a remote site server through a data storage server on the other node; due to the fact that the data storage server searches for and positions the repeated file data streams and it is guaranteed that a large number of data file streams are not transmitted repeatedly, the data transmission amount is reduced, the network bandwidths and the transmission time are saved, and it is guaranteed that backup data do not occupy a large amount of storage space of the remote site server.

Description

technical field [0001] The invention relates to the technical field of information processing, in particular to a long-distance wide-area network disaster recovery backup system and method. Background technique [0002] Information system data is very important to any enterprise or institution. Currently, there are many data disaster recovery and backup methods to protect these important data; among them: data disaster recovery and backup refers to the establishment of a remote data system, which is a computer information system. Provide an environment that can cope with various disasters (such as irresistible natural disasters such as fire, flood, earthquake, war, etc., as well as human-made computer crimes, computer viruses, power failures, network / communication failures, hardware / software errors, and human operation errors. Disaster), so the disaster recovery backup system is also an important guarantee to ensure the security of user data. [0003] see figure 1 At prese...

AI Technical Summary

Problems solved by technology

[0005] Obviously, there are technical defects in the above two backup methods: the technical method of backing up local data to tape library and disk array will face many challenges and have many disadvantages: the tape used by the tape library is easy to damage and is not conducive to storage; the tape is used for disaster recovery and restoration is unreliable; with the large increase in data volume, more and more tapes are needed, which is more difficult to keep; the disk library does not have a RAID protection mechanism, and when the tape is damaged, the backup data will be lost; the backup speed provided by the tape library is often Unable to meet data backup needs

When using a disk array as a backup medium, you will face a large amount of disk space when the amount of backup data is large and the backup data retention time is long; the disk array cannot concurrently process backup data in multiple ways, and the backup speed often does not meet the needs

[0006] By remotely copying the data concentrated in the local storage device to the storage device in the remote computer room for storage through Mirror mirroring technology, the backup data volume needs to be transmitted only when the network bandwidth of the computer room in the two places is large enough. When a large amount of data needs to be copied, data transmission is required. It takes a long time, especially for different cities with a span of 2000 kilometers, the existing technical method of data backup is often not available

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