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Network Coordinate (NC) system is an efficient mechanism to predict Internet distance (latency) with limited times of measurement. In this paper, authors focus on the node churn problem in distributed NC systems. The study on Vivaldi, a representative distributed NC system, shows that under high node churn rate the prediction accuracy of the system will be seriously impaired, which renders the system unusable in many potential application scenarios. As remedy, authors propose the idea and implementation of Myth, an accurate and scalable NC system even under high node churn rate. Myth introduces the merit of Landmark-based NC system to shorten convergence time in simulation-based NC system with negligible extra overhead. Authors evaluate the performance of Myth system with two typical real-world data sets measured in Internet.
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