Recently, development of peer-to-peer (P2P) applications has been giving a paramount attention mostly due to their attractive features such as decentralization and self-organization. Providing the programmer with the “right” platform for developing such applications became a challenge. In this paper we describe the functionality of P2PS, a platform for developing P2P applications in Mozart. The...

Recently, several models have been proposed to design distributed and collaborative infrastructures for web services based systems. In this area, Peer-to-Peer (P2P) networks and Multi-Agents Systems offer many techniques for web services discovery and composition. However, both of the two combinations (P2P/web services and MAS/web services) have suffered from some problems. This article present...

P2P-based Application Layer Multicast (ALM) systems have shown a great success for several group communication applications. But some performance problems still await a major breakthrough from these systems for critical services such as live video streaming. For these applications, one of the problems is the dynamics of users’ presence since the unannounced departure of a peer causes an interru...

Web search engines, such as Google and Yahoo, are based on the centralized database model. Search engines using the centralized database model suffer from a several drawbacks, such as: they have a single point of failure, a limited representation of the web, their index is not up-to-date, and scalability. Currently a lot of research is being done on using peer-to-peer (P2P) technology for the u...

This paper proposes and evaluates different protocols for individual peers to self-configure the P2P overlay networks in various network environments. For smallscale homogeneous networks, an optimizer peer selection protocol is proposed and found to be superior to other peer selection protocols, including random, egoist, altruist and greedy protocols, in terms of network diameter and node eccen...

Current P2P application is usually built on a specific P2P platform. Different P2P applications with similar functions cannot directly share the data and services with one another. Aiming at this problem, we propose PeerBus, a P2P middleware framework, to enable interoperability among different P2P data sharing platforms. To achieve the goal, we develop a set of common operations for providing ...

This paper focuses on P2P based data management and semantic mediation. We propose an approach based on a P2P for semantic interoperability of information sources that aims to combine the advantages of semantic mediation and peer-to-peer systems. It is based on a pure P2P with super peer architecture consisting of two types of peers. The super peer contains a reference ontology, which provides ...

Peer-to-Peer (P2P) computing is a recent hot topic in the areas of networking and distributed systems. Work on P2P computing was triggered by a number of ad-hoc systems that made the concept popular. Later, academic research efforts started to investigate P2P computing issues based on scientific principles. Some of that research produced a number of structured P2P systems that were collectively...

Peer-to-peer (P2P) systems represent nowadays a large portion of Internet traffic, and are fundamental data sources. In a pure P2P system, since no peer has the power or responsibility to monitor and restrain others behaviours, there is no method to verify the trustworthiness of shared resources, and malicious peers can spread untrustworthy data objects to the system. Furthermore, data descript...

This paper addresses the study of fundamental properties of stream-based content distribution services. We assume the presence of an overlay network with limited connectivity degree, and we develop a mathematical model that captures the essential properties of overlaybased streaming protocols and systems. The methodology is based on graph theory and models the streaming system as a stochastic p...