Bandwidth estimation: metrics, measurement techniques, and tools
IEEE Network: The Magazine of Global Internetworking
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Most bandwidth estimation tools require access to both ends of a measured path, which is increasingly difficult considering the constantly expanding size of the Internet. We present Pathperf, a tool for estimating bulk transfer capacity by downloading files from websites at one end of a path. We collect 3.3 million websites in 22,656 ASes and leverage DNS infrastructure to deliver website information. Comparing with Iperf, Pathperf saves more than 50% of the network traffic and its relative error rate is under 10%.