端到端路径容量测量工具性能分析

Performance analysis of end-to-end path capacity measurement tools

分析已有路径容量测量工具的性能,定义了评价工具性能的指标集,在自行搭建的可控网络环境和可重复的多种背景流量条件下,对几种典型的测量工具性能进行实验评估。实验发现pathchar、clink等基于VPS技术的工具测量误差较大;pathrate准确性虽较高,但测量开销大。大背景流量下现有工具的准确性、测量开销等都不理想。

The performance of current path-capacity measurement tools were analyzed and an index set for tools performance evaluation was set. And several typical path-capacity measurement tools were evaluated in a self-building controllable network under many repeatable cross traffic load conditions. The main findings include, VPS based tools such as pathchar, clink, have relatively larger measurement errors; although pathrate is more accurate, it has bigger measurement costs. When the cross traffic load is high, all of these tools are inaccurate and need great measurement costs.