Research And Implementation Of Web Distributed Database System

As the information age has come, people store more and more information in computer. How to store, manage and extract information effectively has become the focus of people. Concentrative DB has not satisfied human's need and Distributed DB occupies the new stage.This article mainly introduces the concept and theory of Distributed DB. It takes the C/S Cooperated Distributed DB, which was constructed by using Sybase in some insurance and invest company, as an example and gives thorough discuss about data fragment, distribution and DB connection etc. in Distributed DB System.At the same time, going along with the amazing development of Internet/Intranet and the wide use of WWW, the method and mode of people getting and handling information is going through radically revolution and the Web-cored enterprise information management system is warmly welcomed by managers. The keystone of the thesis is the development direction of Web technology, that is B/S mode has developed from two-layer structure to three or more layers. The thesis takes the financing plan search management system of some insurance and investment company for example, puts emphasis on discussing the solution of Sybase Enterprise Web, distributed and C/S application, and introduces at length the whole application procedure of the Object Component of using B/S mode which uses Jaguar CTS developed by Java as the Component Server and PowerDynamo as the Application Server.The idea of this solution is consistent with that of Web solution produced by Middle-Component Company SEA. It was proved by lots of experiments and applications in a financial project.