Method and system for data access

Abstract

The present invention relates to the field of information technology, especially relates to a data accessing method and system. The embodiment of the present invention provides a data accessing method, when an exception occurs in a main data area, a main / backup data area switch module updates the information of the backup data area with the information of the main data area. When an exception occurred in the main data area, an application module can still provide continuous service by the method provided by the embodiment of the present invention.

Description

technical field [0001] The present invention relates to the field of information technology (Information Technology, IT for short), and in particular to a data access method and system. Background technique [0002] In the existing data processing system, the application module directly accesses the data area to read and write data, and according to the mutual exclusion mechanism provided by the operating system, it is guaranteed that only one application module has the right to access the data area to read and write data at a certain moment. [0003] When the application module accesses the data area, it generates a read and write operation log. When the data in the data area is abnormal, the application module restores the data in the data area according to the read and write operation log. [0004] Through the analysis of the prior art, the inventor believes that the prior art has at least the following problems: [0005] When the data in the data area is abnormal, the d...

AI Technical Summary

Problems solved by technology

[0005] When the data in the data area is abnormal, the data in the data area is unavailable before using the read-write log to restore the data, and the application module cannot continue to access the data area to read and write data, so that the application module cannot provide continuous services

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