Method and device for achieving data protection

Abstract

The invention discloses a method and device for achieving data protection. The method includes the following steps that when an IO request is intercepted, information of the IO request is extracted, and whether data of the IO request are valid or not is judged according to the extracted information of the IO request, wherein the IO request includes the information of the IO request and the data of the IO request; when the data of the IO request are valid, the data of the IO request are stored in a disk corresponding to the information of the IO request; a bitmap identification of a data block where the data of the IO request are stored is set to have been changed; data on the data block with the changed bitmap identification is transmitted to a log volume corresponding to the disk and stored on the log volume corresponding to the disk in a secondary index mode. The problem of repeated copying of data is solved by monitoring changes of each IO and changes of the bitmap identification, and therefore data protection efficiency is improved.

Description

technical field [0001] The invention relates to the field of data disaster recovery, in particular to a method and device for realizing data protection. Background technique [0002] With the Internetization and digitization of the information industry, enterprises have entered the era of office automation. During this period, many important data will be generated. These data are often the core data of enterprises, and their security needs to be guaranteed: on the one hand, data security Security must be guaranteed, but on the other hand, these data are threatened by hardware damage, virus damage, and human error deletion. Therefore, enterprises have to need a method and means to protect these data, and because some business data is continuously generated, they must be able to back up these data in real time. When data is damaged or lost, it must be possible to restore the data, and the speed of restoring the data should be as fast as possible. Traditional disk mirroring o...

AI Technical Summary

Problems solved by technology

Traditional disk mirroring often uses data copying directly, which will have the following two problems: First, it is impossible to monitor the changes of each input and output (IO) operation (the general backup method is to copy the disk data at a certain point in time operation, changing data between two points in time will cause omissions), which may lead to omission of data for an IO operation (including write data and read data, especially when the data of the IO operation is write data, because the data was missed, the location where the data was originally stored was not stored and the data could not be correctly backed up to the backup end); the second is that when backing up data, there is still duplication when the host encounters an exception copy problem

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