Simon Patarin

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In this paper we present an empirical study of a workload gathered by crawling the eDonkey network --- a dominant peer-to-peer file sharing system --- for over 50 days.We first confirm the presence of some known features, in particular the prevalence of free-riding and the Zipf-like distribution of file popularity. We also analyze the evolution of document(More)
In application server systems, such as J2EE, replication is an essential strategy for reliability and efficiency. Many J2EE implementations, both commercial and open-source, provide some replication support. However, the range of possible strategies is wide, and the choice of the best one, depending on the expected application profile, remains an open(More)
This paper presents Pandora, a network monitoring platform that captures packets using purely passive techniques. Pandora addresses current needs for improving Internet middleware and infrastructure by providing both in-depth understanding of network usage and metrics to compare existing protocols. Pandora is flexible and easy to use and deploy. The(More)
It's generally agreed that future software systems should be distributed, open, selforganizing, scalable, and robust. Fully distributed systems can't rely on centralized control, and open systems can't ensure that malicious or selfish components don't invade them. The requirement for high scalability means that systems should run at least as well, and(More)
Today data sources are pervasive and their number is growing tremendously. Current tools are not prepared to exploit this unprecedented amount of information and to cope with this highly heterogeneous, autonomous and dynamic environment. In this paper, we propose a novel semantic overlay network architecture, PARIS, aimed at addressing these issues. In(More)
In response to the exponential growth of Internet traffic, web proxy caches are deployed everywhere. Nonetheless, their efficiency relies on a large number of intrinsically dynamic parameters, most of which can not be predicted statically. Furthermore, in order to react to changing execution conditions — such as network resources, user behavior or flash(More)
Today, component oriented middlewares are used to design, develop and deploy distributed applications easily. They ensure the heterogeneity, interoperability, and reuse of software modules. Several standards address this issue: CCM (CORBA Component Model), EJB (Enterprise Java Beans) and .Net. However they offer a limited and fixed number of system(More)