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Characterization of BitTorrent swarms and their distribution in the Internet

机译：BitTorrent群的特征及其在Internet中的分布

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摘要

The optimization of overlay traffic resulting from applications such as BitTorrent is a chal?lenge addressed by several recent research initiatives. However, the assessment of such optimization techniques and their performance in the real Internet remains difficult. Despite a considerable set of works measuring real-life BitTorrent swarms, several charac?teristics of those swarms relevant for the optimization of overlay traffic have not yet been investigated. In this work, we address this lack of realistic swarm statistics by presenting our measurement results. In particular, we provide a statistical characterization of the swarm sizes, the distribution of peers over autonomous systems (AS's), the fraction of peers in the largest AS, and the size of the shared files. To this end, we consider different types of shared content and identify particular characteristics of regional swarms. The selection of the presented data is inspired by ongoing discussions in the IETF working group on application layer traffic optimization (ALTO). Our study is intended to provide input for the design and the assessment of ALTO solutions for BitTorrent, but the applica?bility of the results is not limited to that purpose.
机译：由诸如BitTorrent之类的应用程序产生的覆盖流量的优化是一些最近的研究计划所面临的挑战。但是，评估此类优化技术及其在实际Internet中的性能仍然很困难。尽管测量现实生活中的BitTorrent集群的工作量很大，但尚未研究与优化覆盖流量相关的那些集群的几种特性。在这项工作中，我们通过展示我们的测量结果来解决缺乏现实的群体统计的问题。特别是，我们提供了群体大小，对等体在自治系统（AS）上的分布，最大AS中对等体的比例以及共享文件大小的统计特征。为此，我们考虑了不同类型的共享内容，并确定了区域群的特定特征。在IETF工作组中有关应用程序层流量优化（ALTO）的持续讨论中，启发了对呈现数据的选择。我们的研究旨在为BitTorrent的ALTO解决方案的设计和评估提供输入，但是结果的适用性不限于该目的。

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