I tube, you tube, everybody tubes: analyzing the world's largest user generated content video system
Proceedings of the 7th ACM SIGCOMM conference on Internet measurement
Youtube traffic characterization: a view from the edge
Proceedings of the 7th ACM SIGCOMM conference on Internet measurement
YouTube traffic dynamics and its interplay with a tier-1 ISP: an ISP perspective
IMC '10 Proceedings of the 10th ACM SIGCOMM conference on Internet measurement
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In this paper we "reverse-engineer" the YouTube video delivery cloud by building a distributed measurement infrastructure. Through extensive data collection and analysis, we deduce the key design features underlying the YouTube video delivery cloud. The design of the YouTube video delivery cloud consists of three major components: a "flat" video id space, multiple DNS namespaces reflecting a multi-layered logical organization of video servers, and a 3-tier physical cache hierarchy. By mapping the video id space to the logical servers via consistent hashing and cleverly leveraging DNS and HTTP re-direction mechanisms, such a design leads to a scalable, robust and flexible content distribution system.