Scalability is a fundamental problem for information systems when the amount of managed data increases. Peer to Peer systems are usually used to solve scalability problems as centralized approaches do not scale without large dedicated infrastructure. But most current Peer to Peer systems do not take into account that indexed data can be dynamic and change their values very often. Thus, we propo...

Peer-to-peer systems typically operate in large-scale, highly unreliable and insecure environments. Tackling this complexity requires good software design. Yet, many peer-to-peer systems are developed in an ad-hoc manner, and little has been published about their software architecture. We studied various academic and open source peer-to-peer systems and identified design patterns for the overla...

With the advance in mobile wireless communication technology and the increasing number of mobile users, peer-to-peer computing, in both academic research and industrial development, has recently begun to extend its scope to address problems relevant to mobile devices and wireless networks. This paper is a performance study of peer-to-peer systems over mobile ad hoc networks. We show that cross-...

1 G. Portokalidis is also with Leiden University 2 E.P. Markatos and M. Marazakis are also with the University of Crete. Abstract—Peer-to-peer file sharing systems have become increasingly popular over the last few years, by attracting large numbers of Internet users, who share a continuously increasing volume of data. Since the launch of Napster, the first widely known peer-to-peer file sharin...

In a peer-to-peer system, there is no centralized control or hierarchical organization: each peer is equivalent in functionality and cooperates with other peers in order to solve a collective task. Such systems have evolved from simple keyword-based peer-to-peer file sharing systems like Napster and Gnutella to schema-based peer data management systems like Edutella [3] or Piazza [2], which han...

A peer-to-peer system can be de ned as an overlay network built by a set of nodes on top of a physical network infrastructure and its operating protocols, such as the Internet. In a peer-to-peer network, each node maintains a limited number of connections with other nodes, called peers, and the graph of peer connections constitutes the overlay's topology. One of the most fundamental properties ...