Mobility

Comparing Passive Network Monitoring of Grid Application Traffic with Active Probes

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Executive Summary

Distributed applications require timely network measurements so that they can adapt to changing network conditions and make efficient use of grid resources. One of the key issues in obtaining network measurements is the intrusiveness of the measurements themselves - how much network performance is "wasted" taking the measurements? The goal is to combine active and passive monitoring techniques to reduce the need for intrusive measurements without sacrificing the accuracy of the measurements. Authors are developing a bandwidth monitoring tool as part of the Wren network measurement system that will reduce the burden on the network by passively obtaining measurements from existing application traffic whenever possible, instead of actively probing the network.

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