pathChirp: A Light-Weight Available Bandwidth Estimation Tool for Network-Aware Applications

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Executive Summary

Many grid computing applications require massive data transfers for distributed analysis. Knowledge of network properties like the available bandwidth along the communication paths between grid nodes can reduce data transfer times and improve scheduling of grid computing tasks thereby enhancing performance. This paper presents pathChirp, a light-weight active probing tool for estimating the available bandwidth on a communication network path. Based on the concept of "Self-Induced Congestion," pathChirp features an exponential flight pattern of probes call a chirp.

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