Robert Harakaly

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The deployment of large scale grids generates new challenges in system and network monitoring. Users and distributed applications need to access logical and up to date information on sites reachability, links performances and services availability. In this paper, we propose a presentation model suitable for grid environments, and we present the tool(More)
The complexity of Grid environments is growing as more projects and applications appear in this quick-evolving domain. Widespread applications are distributed over thousands of computing elements , various communities of users are aggregated into virtual organizations , resources availability is more and more dynamic and final locations of jobs cannot be(More)
The fast expansion of Grid technologies emphasizes the importance of network performance measurement. Some network measurement methods, like TCP throughput or latency evaluation, are very sensitive to concurrent measurements that may devalue the results. This paper presents the Probes Coordination Protocol (PCP) which can be used to schedule different(More)
A Grid Network monitoring and performance measurement infrastructure is a key component of a large-scale Grid. Requirements for network monitoring with respect to Grid operations as well as performance characteristics and their relevance to Grid context have to be carefully identified before realizing such a system. In this paper we analyze the main issues(More)
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