A data synchronization method, system and device between storage systems

Abstract

The invention discloses a method, a system and a device for data synchronization among storage systems. The method comprises the following steps: a synchronization source point reads a data synchronization operation from a stream file, sends a data synchronization request to a synchronization destination point according to the data synchronization operation and carries the position of the data synchronization operation in the stream file in the data synchronization request as a first POS position; the synchronization destination point receives the data synchronization request, reads the first POS position from the data synchronization request and verifies the first POS position according to a second POS position stored in the synchronization destination point; the synchronization destination point executes the data synchronization operation according to the data synchronization request when the verification is successful and updates the second POS position stored in the synchronization destination point to the first POS position after successful execution of the data synchronization operation; and the synchronization destination point sends a verification failure message to the synchronization source point when the verification fails. The reliability of data synchronization can be improved by using the method, the system and the device for data synchronization among storage systems.

Description

technical field [0001] The present invention relates to the field of computer technology, in particular to a method, system and device for synchronizing data between storage systems. Background technique [0002] In order to ensure data consistency between different storage systems, data synchronization between different storage systems is often required. In the process of data synchronization, there will be at least one "synchronization source point" and at least one "synchronization destination point". " as an example, the data synchronization method in the prior art is introduced in detail. [0003] figure 1 It is the flow chart of "point A" initiating data synchronization operation. [0004] like figure 1 As shown, the process includes: [0005] Step 101, "point A" receives a data update operation initiated by the outside world. [0006] Step 102, "Point A" updates its own stored data according to the received data update operation, and then writes the data update ...

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Problems solved by technology

[0019] It can be seen from the above scheme that if the synchronization device on "point A" fails, resulting in the loss or confusion of the recorded "POS position", the synchronization device will read data synchronization operations from the wrong POS position, and these data synchronization operations may For "point B" that has already been executed, it may be that "point B" still has some other data synchronization operations that have not been executed. Under correct circumstances, these other data synchronization operations need to be performed first. Therefore, when "point B" is based on When the data synchronization request sent by "point A" executes the data synchronization operation, since "point B" will directly execute the data synchronization operation according to the data synchronization request sent by "point A", the data synchronization of "point B" will also be executed. Errors are generated, and the reliability of data synchronization is poor

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