Meeting Sea Elective Systems And Distributed Application Design

Modern academic administration of university needs the help of modern information system. Way System is developed for this purpose and has played an important role in the academic administration of Zhejiang University. This paper mainly shows the design and the architecture of the Select Course subsystem?a part of Way System--in distributed components technology.As a large MIS (Management Information System), the development of Way System has met many problems. For example, the operation of selecting courses once broke down resulting from the fact that the visiting number exceeded expectation. This break-down is due to not only the deficiency of MEM and the slow speed of CPU, but also the out-of-date architecture. The scaling of Traditional C/S and B/S architectures is so weak that it can't keep up with the -rapid development of application. However, the distributed components architecture provides high scaling by distributing the whole load to many hosts. This paper, in aii effort to overcome the weaknesses of the traditional B/S architecture, adopts the COM+ technology of Windows 2000 and uses three-layer architecture to improve the performance of the whole system.The first chapter introduces the development history and the basic architecture of Way System. In second chapter. UML. an object oriented software development language is introduced. The third chapter elaborates the Selecting Course subsystem using UML and the fourth chapter deals with the distributed components architecture. The fifth chapter shows how to expand the system based on the dynamic load balancing technology with COM+ in Windows 2000. hi the last chapter, the future development of the Way system is presented.