Data copying method and device

Abstract

The invention provides a data copying method and device. The data copying method comprises the steps that according to a copying task, a copying-out thread and a copying-in thread are started in parallel, the copying-out thread reads out copying data blocks from a source volume, the data blocks are added into a sequential task queue, and a prior copying data block is added into a prior task queue if the prior copying data block exists in the prior task queue; if the prior copying data block exists in the prior task queue, the copying-in thread acquires the prior copying data block from the prior task queue, the acquired prior copying data block is written into a target volume, and the copying data blocks are acquired from the sequential task queue and written into the target volume. According to the data copying method and device, read-out and write-in of copying data are performed through the copying-out thread and the copying-in thread in parallel, so that the efficiency for data copying is enhanced; prior copying is achieved under the data conflict condition through the sequential task queue and the prior task queue, and the consistency of the copying data is guaranteed.

Description

technical field [0001] The invention relates to the technical field of disaster recovery storage, in particular to a data copy method and device. Background technique [0002] With the development of information technology, enterprises rely more and more on data processing to carry out business activities. Therefore, high reliability and high availability of data processing are becoming more and more critical. Although with the development of science and technology, the reliability of computer systems is increasing day by day, the losses caused by natural and man-made disasters such as earthquakes, floods, fires, wars, or failures of network equipment due to software and hardware failures can still be easily destructively destroy the IT systems on which the business depends. Therefore, establishing a disaster recovery system has become an inevitable choice for enterprises that rely heavily on IT systems. [0003] Data copy is a basic content of data backup in the disaster ...

AI Technical Summary

Problems solved by technology

When performing disaster recovery operations, it is often necessary to back up a large amount of data, and the serial method will inevitably cause long-term data copying

In addition, if important data needs to be backed up first, it is currently not possible

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