OverSim: A scalable and flexible overlay framework for simulation and real network applications

A fundamental problem in studying peer-to-peer networks is the evaluation of new protocols. This commonly involves both the simulation of the protocol in a large-scale network as well as the testing of the protocol in connection with real applications in networks like PlanetLab. To facilitate these tasks we have developed the overlay simulation framework OverSim. It is designed to fulfill a number of requirements that have been partially neglected by existing simulation frameworks.