Study On Data Replication Of Tax Information System

As the development of database and network technology, the distributed database system has been developed maturely not only on theory but also on application, for example: Internet application, grid computing, data warehouse. The data inconsistency problems caused by distribution of the geographical position usually occur. In solving these problems, it has been a key in the database technology research field.The data replication is the commonly used one kind of data duplication technology in the distributional database application procedure. Data copies are saved in many computers. It provides the fast effective method for the information issue of the distributed environment. While it guarantees the data the synchronization and consistency, but also it may enhance the data inquiry deposit and withdrawal the performance, enables the long-distance user in local to quote the duplication the data to complete the distributional operation, reduces the network and the center database server load.In the existing tax management information system foundation, according to the information construction development present situation of the Chongqing Tax bureau, The paper has deeply analyzed the system data duplication demand, has discussed to construct the distributional database the method and the step in the tax department, has designed the distributional database data model and the architecture, has given the tax system data replication principle of design and the realization method.The paper has mainly done following several aspect research work:①Has analyzed the distributional database system characteristic, the distributional database classification, the architecture, the pattern structure and the advantage and disadvantage, need to pay attention the question, has provided the base for the tax system distributional database design.②Has described the data replication concept, the basic principle, has thoroughly studied the data duplication technology present situation in various databases manufacturer, has conducted the thorough research and the discussion to the data duplication technology characteristic of current main database system, has enumerated the commonly used methods and the type of the database replication, has analyzed the reason which the data duplication conflict produces and proposed the solution.③Introduced the tax management information system development background, and has made a simple outline to its function, elaborated this system distributional database design principle, has given the system distributional database concrete design proposal, has introduced the system data backup method.④Based on the information development present situation of the Chongqing Tax bureau, the paper has analyzed the data replication demand and the principle of design, proposed the data duplication solution, and has given the detailed realization method.