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...

We explore the utility and execution of recursive queries as an interface for querying distributed network graph structures. To illustrate the power of recursive queries, we give several examples of computing structural properties of a P2P network such as reachability and resilience. To demonstrate the feasibility of our proposal, we sketch execution strategies for these queries using PIER, a P...

This paper provides a brief introduction to peer-to-peer (P2P) systems. Basic definitions and characteristics of P2P systems are described in Section 1. A comparison of a two related paradigms: P2P and Grid computing is also given. Section 2 classifies P2P substrates into two categories: structured and unstructured. Description of each category along with some examples is provided. A wide range...

As one of the most important technology for implementing large-scale distributed systems, peer-to-peer (P2P) computing has attracted much attention in both research and academia communities, for its advantages such as high availability, high performance, and high flexibility to the dynamics of networks. However, multidimensional data indexing remains as a big challenge to P2P computing, because...

Peer-to-peer (P2P) computing is a technological concept which is applicable at varied levels of system architecture. Its typical characteristic is that there is symmetric communication and data exchange between the peers; each peer is both a client and a server. It is the basis for decentralized distributed computing. The concept is widely deployed in different contexts and no formal definition...

This paper presents a statistical analysis of the structure of peer-to-peer (P2P) social networks that captures social associations of distributed peers in resource sharing. Peer social networks appear to be mainly composed of pure resource providers that guarantee high resource availability and reliability of P2P systems. The major peers that both provide and request resources are only a small...

This paper presents a statistical analysis of the structure of Peer-to-Peer (P2P) social networks that captures social associations of distributed peers in resource sharing. Peer social networks appear to be mainly composed of pure resource providers that guarantee high resource availability and reliability of P2P systems. The major peers that both provide and request resources are only a small...

As Structured Peer-to-Peer (P2P) Networks become popular, there is an emerging need to monitor continuously the huge number of participants in a robust and scalable manner. To this end, aggregation has emerged as a basis for the self-management of these networks. However, the structured P2P networks lack today of efficient mechanisms for the decentralized computation of these aggregates. In thi...

Recently, in contrast with the centralized networks (e.g., traditional client/server systems), the distributed networks such as Peer-to-Peer (P2P) networks and grid networks have attracted much attention due to their scalability. While the distributed networks have the advantage of allowing the node(s) to join or leave the network easily, the issue of lack of resiliency to both attacks and faul...