[NRG] Notification: End-User Mapping (Nabeel Akhtar) @ Mon Oct 26, 2015 11am - 12pm (NRG at BU)

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Title: End-User Mapping (Nabeel Akhtar)
Title: End-User Mapping: Next Generation Request Routing for Content  

Presenter: Nabeel Akhtar

Content Delivery Networks (CDNs) deliver much of the world's web, video,  
and application content on the Internet today. A key component of a CDN is  
the mapping system that uses the DNS protocol to route each client's  
request to a "proximal" server that serves the requested content. While  
traditional mapping systems identify a client using the IP of its name  
server, we describe our experience in building and rollingout a novel  
system called end-user mapping that identifies the client directly by using  
a prefix of the client's IP address. Using measurements from Akamai's  
production network during the roll-out, we show that end-user mapping  
provides significant performance benefits for clients who use public  
resolvers, including an eight-fold decrease in mapping distance, a two-fold  
decrease in RTT and content download time, and a 30% improvement in the  
time-to-first-byte. We also quantify the scaling challenges in implementing  
enduser mapping such as the 8-fold increase in DNS queries. Finally, we  
show that a CDN with a larger number of deployment locations is likely to  
benefit more from end-user mapping than a CDN with a smaller number of  

Fangfei Chen, Ramesh K. Sitaraman, Marcelo Torres

Link to paper:
When: Mon Oct 26, 2015 11am - 12pm Eastern Time
Where: MCS 148
Video call: https://plus.google.com/hangouts/_/bu.edu/nrg  
Calendar: NRG at BU
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