Fast data synchronization method in continuous data protection technology

Abstract

The invention relates to a fast data synchronization method in continuous data protection technology. The method is technically characterized by including the steps of firstly, establishing correspondence between all data blocks in disk partitions and a write operation status bitmap in a production terminal device; secondly, synchronizing for the first time, namely copying all the data blocks in the disk partitions in the production terminal device to an image storage region in a target terminal; thirdly, performing progressive synchronization, namely calculating the number of the data blocks, engaged in write operation, in the disk partitions during synchronization; if the changing number is lower than a set threshold, interrupting front-end application of the production terminal device to quickly complete synchronization of the changing data blocks; and if not, copying the data blocks, engaged in write operation, to the target terminal. The data blocks which change in data synchronization are recorded by the write operation status bitmap, the changing data blocks are determined according to the bitmap so as to achieve quick data synchronization, and accordingly data synchronization efficiency is improved. The method has the advantages of high timeliness, fast processing, safety and reliability and the like.

Description

technical field [0001] The invention belongs to the technical field of data backup, in particular to a fast data synchronization method in continuous data protection technology. Background technique [0002] With the deepening of informatization applications, users have generally strengthened the protection of data. Data protection is usually achieved through data backup and data recovery methods. The traditional regular backup method is far from meeting the needs of real-time protection. Therefore, many key applications use continuous data protection technology to achieve real-time data protection and Quick recovery. For example, the patent document "A Data Protection Method with Multi-Time Granularity" (Application No. 201110270306.5) provides a continuous data protection method. The implementation method is as follows: Step 1. Synchronize the production end data to the target end image during initialization In the storage area; step 2, capture the data write operation o...

AI Technical Summary

Problems solved by technology

During the processing of step 1, currently domestic and foreign manufacturers need to suspend the application of production-end equipment. As the amount of user data increases, the suspension time will become longer and longer. Due to the continuous data protection method Applications are generally critical applications. This kind of interruption will bring certain losses to the user and increase the complexity of the user's use. In some special cases, the user cannot accept this kind of interruption

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