[Nets-seminars] Talk next Friday -- change of room

[Richard G. Clegg]

Next week's UCL electronic engineering talk will be by Georgios 
Smaragdakis from the Technical University of Berlin.  It is at 16:00 in 
66-72 Gower Street on 16th March.  There is a change of room to GS/006.

"Web Content Cartography"

Abstract:
Recent studies show that a significant part of Internet traffic is 
delivered through Web-based applications. To cope with the increasing 
demand for Web content, large scale content hosting and delivery 
infrastructures, such as data-centers and content distribution networks, 
are continuously being deployed. Being able to identify and classify 
such hosting infrastructures is helpful not only to content producers, 
content providers, and ISPs, but also to the research community at 
large. For example, to quantify the degree of hosting infrastructure 
deployment in the Internet or the replication of Web content.

In this talk, we introduce Web Content Cartography, i. e., the 
identification and classification of content hosting and delivery 
infrastructures. We propose a lightweight and fully automated approach 
to discover hosting infrastructures based only on DNS measurements and 
BGP routing table snapshots. Our experimental results show that our 
approach is feasible even with a limited number of well-distributed 
vantage points. We find that some popular content is served exclusively 
from specific regions and ASes. Furthermore, our classification enables 
us to derive content-centric AS rankings that complement existing AS 
rankings and shed light on recent observations about shifts in 
inter-domain traffic and the AS topology.


Bio:
Georgios Smaragdakis is a Senior Research Scientist at Telekom 
Innovation Laboratories and the Technical University of Berlin, Germany. 
He received the Ph.D. degree in computer science from Boston University, 
USA, the Diploma in electronic and computer engineering from the 
Technical University of Crete, Greece, and he interned at Telefonica 
Research, Barcelona, Spain. His research interests include the 
measurement, performance analysis and optimization of content 
distribution systems and overlay networks with main applications in 
overlay network creation and maintenance, service deployment, server 
selection, network storage management, distributed caching, and 
ISP-Application collaboration. Dr. Smaragdakis received the ACM IMC 2011 
best paper award for his work on web content cartography.

-- 
Richard G. Clegg,
Dept of Elec. Eng.,
University College London
http://www.richardclegg.org/