Performance modeling of object middleware

The tremendous growth of the Internet [42] and the ongoing developments in the hardware and software industry have boosted the development of Information and Communication Technology (ICT) systems. These systems consist of geographically distributed components communicating with each other using networking technology. Such systems are commonly referred to as distributed systems. A key challenge of distributed systems is interoperability: the vast diversity in hardware, operating systems, and programming languages, makes it difficult to build distributed applications. Over the past decade there have been a lot of advances in middleware technology aimed at solving this interoperability problem. Middleware is software that hides architectural and implementation details of an underlying system and offers well-defined interfaces instead. Some of the key advances in middleware include OMG CORBA objectmiddleware and the Sun Java infrastructure middleware. The overall objective of this thesis is to develop and validate quantitative performance models of distributed applications based on middleware technology. We limit the scope of our research toOMG CORBA object middleware and the Java EE platform.