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Dynamic Distributed Systems

Recent advances in software and Internet technologies have enabled the construction of a new category of component-based distributed systems. These systems consist of various off-the-shelf and application-specific components such as Web servers and clients, Java applets, databases, etc., which communicate with each other using standard protocols. Development and maintenance of these systems is difficult due to the complexity and heterogeneous nature of these systems. This work is concerned with facilitating these tasks. We describe a new approach to analyzing and debugging such systems by looking at the communication between the components of these systems. This approach allows us to make the interactions in such systems transparent. By analyzing and transforming the information we collect, we are able to present the user with a simple, abstract view of the system analyzed. To proove this concept, we have implemented a debugging environment based on this approach. We describe the approach and its implementation, and discuss their advantages and limitations.