Method and medium server for remote data backup

Abstract

The invention discloses a method for remote data backup. The method comprises the steps as follows: a backup event which causes the data backup to a local medium server is monitored; and the monitored backup event is synchronized to a remote medium server in an asynchronous replication form. The backup event executed by the remote medium server is completely consistent with the backup event sent by original data, and the backup event is not required to be decomposed into substrate IO operation to be synchronized, so that the consistency between the backup data in the remote medium server and the original data is improved greatly. The invention also discloses a medium server.

Description

technical field [0001] The invention relates to the technical field of data backup, in particular to a remote data backup method and a media server. Background technique [0002] Data backup is an important protection measure to prevent data loss. Generally, data distributed on user workstations or servers is copied to a certain media server for storage. The data stored on the media server is the same as the original data, so that when the original data occurs When there is a problem, the data on the media server can be used for recovery to protect the security of important data, also known as data disaster recovery. [0003] According to the distance between the media server and the original data, the existing backup methods can be divided into remote backup and local backup. Remote backup includes data backup between different locations in the city, different cities, and even different countries, which can effectively prevent data backup in some regions. It can provide hi...

AI Technical Summary

Problems solved by technology

If the IO operations in multiple backup events are likely to be performed on the same data, such as modifying the value of the same data multiple times, obviously, for the final modification result, only the last IO operation needs to be performed, that is, the previous operation are merged into the last operation; but because it is impossible to determine whether the IO operations are overlapping, the IO operations cannot be merged, resulting in the need to synchronize more data to the remote media server; in addition, for some special backup events , such as synthesizing backups, modifying backup keys, etc., the event itself only needs some parameters to execute the event on the media server. If the asynchronous replication method based on IO operations is used, more data will be synchronized to the remote media server

[0013] In addition, when performing remote backup in asynchronous mode, there may be a single-operation failure in which partial data cannot be synchronized to the remote media server. Since the synchronization based on IO operations cannot determine the specific impact of the failure on the entire backup process, the IO cannot be easily discarded. operation that can only be interrupted by interrupting the entire backup process

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