通过托管设施的快捷方式
Shortcuts through Colocation Facilities
摘要：
在现有互联网基底之上运行的网络覆盖对于互联网终端用户具有长期价值，例如，实时应用。这样的覆盖可以采用业务中继来产生比直接路径低的路径时延，这种现象被称为三角不等式违反（TIV）。过去的研究确定了使用TIV减少延迟的机会。然而，他们没有调查在托管设施（Colos）中策略性选择中继的收益。在这项工作中，我们回答了以下问题：（i）在延迟（RTT）减少方面，Colo托管的中继与其他中继以及直接互联网相比如何;（ii）放置中继的最佳位置是什么？为此，我们进行了一个大规模的为期一个月的测量RIPE Atlas（RA）节点之间的域间路径作为端点，位于眼球网络。我们使用Planetlab节点、其他RA节点和Colos中的机器作为中继。我们检查通过选定的中继，以及直接路径获得的覆盖路径的RTT。我们发现，基于科洛中继执行最好的，可以实现延迟减少对直接路径，从几个到100毫秒，在76%的总情况下，75%（58%的总情况下），这些减少只需要10个中继在6个大科洛。
英文摘要：
Network overlays, running on top of the existing Internet substrate, are of perennial value to Internet end-users in the context of, e.g., real-time applications. Such overlays can employ traffic relays to yield path latencies lower than the direct paths, a phenomenon known as Triangle Inequality Violation (TIV). Past studies identify the opportunities of reducing latency using TIVs. However, they do not investigate the gains of strategically selecting relays in Colocation Facilities (Colos). In this work, we answer the following questions: (i) how Colo-hosted relays compare with other relays as well as with the direct Internet, in terms of latency (RTT) reductions; (ii) what are the best locations for placing the relays to yield these reductions. To this end, we conduct a large-scale one-month measurement of inter-domain paths between RIPE Atlas (RA) nodes as endpoints, located at eyeball networks. We employ as relays Planetlab nodes, other RA nodes, and machines in Colos. We examine the RTTs of the overlay paths obtained via the selected relays, as well as the direct paths. We find that Colo-based relays perform the best and can achieve latency reductions against direct paths, ranging from a few to 100s of milliseconds, in 76% of the total cases; 75% (58% of total cases) of these reductions require only 10 relays in 6 large Colos.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
