We introduce XPORT, a profile-driven distributed data dissemination system that supports an extensible set of data types, profile types, and optimization metrics. XPORT efficiently implements a generic tree-based overlay network, which can be customized per application using a small number of methods that encapsulate application-specific data filtering, profile aggregation, and optimization logic. The clean separation between the "plumbing" and "application" enables the system to uniformly support disparate dissemination-based applications.We first provide an overview of the basic XPORT model and architecture. We then describe in detail an extensible optimization framework, based on a two-level aggregation model, that facilitates easy specification of a wide range of commonly used performance goals. We discuss distributed tree transformation protocols that allow XPORT to iteratively optimize its operation to achieve these goals under changing network and application conditions. Finally, we demonstrate the flexibility and the effectiveness of XPORT using real-world data and experimental results obtained from both prototype-based LAN emulation and deployment on PlanetLab.

XPORT is a profile-driven distributed data collection and dissemination system that supports an extensible set of data types, profiles, and optimization metrics. XPORT efficiently builds a generic tree-based overlay network, which can be customized per application using a small number of methods that encapsulate application-specific data-profile matching, aggregation, and optimization logic. The clean separation between the "plumbing" and "application" enables XPORT to uniformly and easily support disparate dissemination-based applications such as content-based feed dissemination and application-level multicast. We propose to demonstrate the basic XPORT system, featuring its extensible optimization framework that facilitates easy specification of a wide range of useful performance goals and a continuous, adaptive optimization model to achieve these goals under changing network and application conditions. We will use two different underlying applications, an RSS feed dissemination application and a multiplayer network game, along with visual system-monitoring tools to illustrate the extensibility and the operational aspects of XPORT.