Abstract:

While some two-tier application is a valid approach for distributed applications, limitations have become apparent, particularly in large  enterprises. Often these applications did not face the challenges and problem of applications integration, efficiency and scalability. Organizations that have a strong need for applications integration, efficiency, scalability and flexibility have begun to build applications following a new model that of distributed application components mostly in the form of threetier architecture.  This paper describes a research project in the area
three tier distributed object multimedia database client-server system utilizing Common Object Request Broker Architecture (CORBA) and Java technology. This system called Science Education Repository System is a three-tier distributed
Multimedia Database System used to store and manipulate related information. The three-tier architecture has emerged to overcome the limitations of the two-tier architecture. This architecture extends the two-tier model by adding another tier in the middle between the client and the server. This tier is called middleware. In this
architecture, a middle tier has been added between the user system interface client environment and the database management server environment. The architecture is useful for an effective distributed client/server design is needed that provides (when
compared to the two tier) increased performance, flexibility, maintainability, reusability, and scalability, while hiding the complexity of distributed processing from the user.