Improving Content Delivery Networks by Tracking Geographic Social Cascades

Add to your list(s) Download to your calendar using vCal

• Salvatore Scellato (University of Cambridge)
• Thursday 10 March 2011, 16:00-17:00
• FW26, Computer Laboratory, William Gates Builiding.

If you have a question about this talk, please contact Eiko Yoneki.

Providers such as YouTube o er easy access to multimedia content to millions, generating high bandwidth and storage demand on the Content Delivery Networks they rely upon. More and more, the di usion of this content happens on online social networks such as Facebook and Twitter, where social cascades can be observed when users increasingly re- post links they have received from others. In this paper we describe how geographic information ex- tracted from social cascades can be exploited to improve caching of multimedia les in a Content Delivery Network. We take advantage of the fact that social cascades can prop- agate in a geographically limited area to discern whether an item is spreading locally or globally. This informs cache re- placement policies, which utilize this information to ensure that content relevant to a cascade is kept close to the users who may be interested in it. We validate our approach by using a novel dataset which combines social interaction data with geographic information: we track social cascades of YouTube links over Twitter and build a proof-of-concept geographic model of a realis- tic distributed Content Delivery Network. Our performance evaluation shows that we are able to improve cache hits with respect to cache policies without geographic and social in- formation.

This talk is part of the Computer Laboratory Systems Research Group Seminar series.

This talk is included in these lists:

• All Talks (aka the CURE list)
• CL's SRG seminar
• Cambridge Centre for Data-Driven Discovery (C2D3)
• Chris Davis' list
• Computer Laboratory Systems Research Group Seminar
• Computer Laboratory talks
• FW26, Computer Laboratory, William Gates Builiding
• Interested Talks
• School of Technology
• Trust & Technology Initiative - interesting events
• bld31
• ndk22's list
• rp587

Note that ex-directory lists are not shown.