DocumentCode :
2396685
Title :
Dissecting Video Server Selection Strategies in the YouTube CDN
Author :
Torres, Ruben ; Finamore, Alessandro ; Kim, Jin Ryong ; Mellia, Marco ; Munafò, Maurizio M. ; Rao, Sanjay
fYear :
2011
fDate :
20-24 June 2011
Firstpage :
248
Lastpage :
257
Abstract :
In this paper, we conduct a detailed study of the YouTube CDN with a view to understanding the mechanisms and policies used to determine which data centers users download video from. Our analysis is conducted using week-long datasets simultaneously collected from the edge of five networks - two university campuses and three ISP networks - located in three different countries. We employ state-of-the-art delay-based geolocation techniques to find the geographical location of YouTube servers. A unique aspect of our work is that we perform our analysis on groups of related YouTube flows. This enables us to infer key aspects of the system design that would be difficult to glean by considering individual flows in isolation. Our results reveal that while the RTT between users and data centers plays a role in the video server selection process, a variety of other factors may influence this selection including load-balancing, diurnal effects, variations across DNS servers within a network, limited availability of rarely accessed video, and the need to alleviate hot-spots that may arise due to popular video content.
Keywords :
computer centres; geographic information systems; social networking (online); video servers; DNS server; ISP network; YouTube CDN; data center; delay-based geolocation technique; load balancing; video server selection process; Europe; Geology; Google; IP networks; Internet; Servers; YouTube; Content distribution networks; Web; internet services;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Distributed Computing Systems (ICDCS), 2011 31st International Conference on
Conference_Location :
Minneapolis, MN
ISSN :
1063-6927
Print_ISBN :
978-1-61284-384-1
Electronic_ISBN :
1063-6927
Type :
conf
DOI :
10.1109/ICDCS.2011.43
Filename :
5961681
Link To Document :
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