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Many peer-to-peer distributed applications can benefit from accurate predictions of Internet path performance. Existing approaches either achieve high accuracy for sophisticated path properties, but adopt an unscalable centralized approach, or are lightweight and decentralized, but work only for latency prediction. In this paper, the authors present the design and implementation of iPlane Nano, a library for delivering Internet path information to peer-to-peer applications. iPlane Nano is itself a peer-to-peer application, and scales to a large number of end hosts with little centralized infrastructure and with a low cost of participation. The key enabling idea underlying iPlane Nano is a compact model of Internet routing.
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