Study Of Distributed Application System Based On CORBA

The support of multimedia, multipoint interact, distributed control and ensured QOS will be the most important characteristics of network application in future because of the rapid development of communication and computer technology. Distributed application has been more and more popular in many fields, such as space-flight, aviation, telecom, medical treatment, finance and so on. However, it is difficult for the classical Client/Server architecture to meet the demand of high performance network application. Distributed system model takes the concept of client/server to its natural conclusion. It can provide better flexibility, reliability and compute capability. Now the design and development of distributed application systems has attracted many researchers.In this paper, theories about distributed system, CORBA and XML are systematically reviewed, and aspects of system design and development using CORBA are discussed. First, the background of distributed application system is introduced, and the technology of distributed object and three main standards are summarized especially the architecture of CORBA, ORB and IDL. Secondly, the construct of distributed system is analyzed through five aspects, namely protocol and service, communication, the architecture of server, concurrency and configuration. At the same time, the matters involved system design and development are presented. In the end, the prototype system based on CORBA and some design principles are proposed, and the effects of dynamic load distribution and group mechanism on system performance and reliability are analyzed. The experiment results show that the distributed system based CORBA is superior to the Client/Server model in performance, flexibility and reliability.