Analysis of Resource Diffusion Characteristics in BT and eMule Based on Monitoring and Tracking

In P2P file-sharing systems, users´ file transferring and downloading behaviors are invisible and non-reproducible. In order to monitor the distribution process and diffusion characteristics in those P2P systems, we implemented a resources monitoring and tracking system for BT and eMule. It continuously retrieves the BT and eMule production servers and crawls data exchanging information among peers in real-time. The system persistently saves data for tracking and searching purposes. By analyzing some target resource files, we find that resources´ diffusion patterns often vary in different P2P systems. Our experiments were based on two popular Chinese Web sites: 5Q Zone (5q.com, BT protocol) and VeryCD (verycd.com, eMule protocol) By studying the characteristics of resources distribution, introducing three P2P resources diffusion models, and giving a quantitative resource diffuseness formula, it concluded that basing on the early-stage distribution trends of a resource file, it is possible to predict its overall distribution pattern later on, which provided a screening guidance to better monitor or track resources in these systems.