The first generation of peer-to-peer file sharing systems followed the traditional client-server paradigm. However, legality and scalability issues have driven the development of decentralized file sharing protocols; the most popular of these being Gnutella. To date, such systems have been unable to match the Quality of Service (Qos) offered by centralized architectures. AGnuS improves QoS on G...

We study the statistical properties of query search strings in the Gnutella peer-to-peer network and find that the distribution of query frequency (how often queries are made) closely follows a lognormal distribution. We find evidence for an upper bound on query cache performance and extend previous studies of Gnutella query caching to model effectiveness of such schemes.

Gnutella, a well-known P2P system, uses resources inefficiently when directly applied to information retrieval problems. In this paper we propose an efficient search mechanism that extends the standard Gnutella protocol to support content-based retrieval in P2P networks. The idea is to estimate locally the relevance of peers when they receive query messages. Only those peers estimated as releva...

Despite recent excitement generated by the peer-to-peer (P2P) paradigm and the surprisingly rapid deployment of some P2P applications, there are few quantitative evaluations of P2P systems behavior. The open architecture, achieved scale, and self-organizing structure of the Gnutella network make it an interesting P2P architecture to study. Like most other P2P applications, Gnutella builds, at t...

Peer-to-peer systems like Napster, Gnutella and Kazaa have recently become popular for sharing information. In this paper, we show how to design peer-to-peer systems within the action systems framework by combining UML diagrams. We present our approach via a case study of stepwise development of a Gnutella-like peer-to-peer system.

Peer-to-Peer (P2P) file-sharing systems such as Gnutella, Morpheus and Freenet have recently attracted a lot of interest from the internet community because they realized a distributed infrastructure for sharing files. Such systems have shifted the Web’s Client-Server model paradigm into a Client-Client model. The tremendous success of such systems has proven that purely distributed search syst...

Despite recent excitement generated by the peer-to-peer (P2P) paradigm and the surprisingly rapid deployment of some P2P applications, there are few quantitative evaluations of P2P systems behavior. The open architecture, achieved scale, and self-organizing structure of the Gnutella network make it an interesting P2P architecture to study. Like most other P2P applications, Gnutella builds, at t...

Peer-to-peer (P2P) file sharing systems provide infrastructure for communities to share storage space (e.g., Napster, Gnutella [1], Kazza [2]). Unlike traditional distributed systems, P2P networks aim to aggregate large numbers of computers that join and leave the network frequently and might not have permanent network (IP) addresses. In a pure distributed P2P system such as Gnutella, peers com...

extensive analysis of user traffic on Gnutella shows a significant amount of free riding in the system. By sampling messages on the Gnutella network over a 24-hour period, we established that almost 70% of Gnutella users share no files, and nearly 50% of all responses are returned by the top 1% of sharing hosts. Furthermore, we found out that free riding is distributed evenly between domains, s...