Abstract -------- Impact of Realistic Workload in Peer-to-Peer Systems, a case study: Freenet This seminar addresses the problem of the study of the performance evaluation and behavior of the large scale Peer-to-Peer file sharing systems. In particular the impact of realistic workload is considered by evaluating the Freenet system. This evaluation is achieved by a simulation approach. A contribution is to show the impact of these more realistic inputs on the overall system performances. Notably new abrupt behavior in the learning process are described. Olivier Richard