Application Study Of Data Communication And Data Consistency In The Distributed Database Environment

With the development of the computer technology, great chance has taken place in the area of enterprise application, which it has changed from the enterprise application based on C/S mode to the enterprise application based on B/S mode. However, enterprise always tries to realize own worthiness in the operation of the enterprise, in order to realize the own worthiness, the enterprise always pursuits the greatest cost performance's solution of enterprise application. Nowadays, many enterprises have a lot of affiliates, and these affiliates distribute in the vast area, however, in order to save the enterprise's operation cost, these huge affiliates often use low-cost communication mode to communicate each other, at the same time, the networks which they use always are complicated and poor. In this condition, the enterprise solution based on B/S mode has lost its advantage, and these enterprises have to find other high cost performance's solution of enterprise application, so the research on the distribution database appears.Distribution database is not distributed database, which it means that system has a lot of databases whose physical positions are distributed, and these databases are independent each other. There are the questions of data communication, data consistency and data security among the databases. In the complitated network environment, how to solve these questions is concerned by many enterprises and it becomes an important problem being paid to research.This thesis makes deeper research on the implementation strategy of network data communication and data consistency of multi-distribution databases and realizes an enterprise application of network data communication and data consistency of distribution database, at the same time, I have developed a file continuous transmission network communication plat which can communicate in the complicated network among the distribution databases. This thesis also researches deeply on the strategy of data consistency of Microsoft SQL Server, network communication based on Winsock and windows systemprogram design. At last, I have associated with the biding project of HuiBei province—HuBei Water Route Tariff and Checking Network Project System (for short GF System) to analysis deeply the enterprise application of distribution database.This thesis uses UML to mode and analysis the system, and I have made a series of application attempting of using UML.Finally, I have associated with the GF System to develop a whole application system about the network data communication and data consistency of distribution database.