[NRG] Reminder: NRG Meeting: "Modern DNS cache network" (Nicaise Eric Cho... @ Mon Sep 23, 2013 11am - 12pm (NRG Calendar)

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Wed Sep 18 11:00:10 EDT 2013

This is a reminder for:

Title: NRG Meeting: "Modern DNS cache network" (Nicaise Eric Choungmo  
Title: Modern DNS cache network

Presenter: Nicaise Eric Choungmo Fofack
PhD student, U. Nice Sophia Antipolis / INRIA (France)

Abstract: Caching is undoubtedly one of the most popular solution that  
easily scales up with a world-wide deployment of resources. The Domain Name  
System (DNS) is a well-known example of such cache deployment. Recent  
experiments on DNS hierarchy reveal that most of DNS caches over Internet  
have deviated from their traditional behavior by violating the Time-To-Live  
(TTL) rule specified in the RFC 6195. Theses DNS caches are called {\em  
modern DNS} in the literature. In this paper, we provide an analytic tool  
to assess the performance of the modern DNS hierarchy. We first introduce a  
class of expiration-based (or TTL-based) cache systems which enables us to  
describe the observed characteristics of modern DNS caches. We then compute  
the metrics of interest and establish several properties from the  
perspective of the modern caching hierarchy and end users, respectively  
using simple arguments of renewal theory. We evaluate our model on a single  
cache using real DNS traces and at network level through Event-driven and  
Monte-Carlo simulations, jointly used with Fourier Amplitude Sensitivity  
Test to explore the space of the input parameters. We observe that our  
analytic model predicts remarkably well all performance metrics at all  
caches of the network with relative errors smaller than $1\%$. Finally, we  
use our theoretic findings to characterize the optimal TTL configuration,  
explain some observed phenomenons and share the lessons learned on this  
modern DNS hierarchy.

Bio: Graduated in June 2009, he got his Engineering degree in  
Telecommunications Systems and Networks form National School of Applied  
Science (ENSA) of Tanger. The year after in August 2010, he received the  
MSc degree in Ubiquitous Networking and Computing at University of Nice  
Sophia Antipolis (UNS). He was granted by The 2010 French Goverment MESR of  
the University of Nice Sophia Antipolis for a PhD. This PhD thesis is  
hosted in the team-project MAESTRO at INRIA Sophia Antipolis for the 3rd  
and last year. He received the Best student Paper Award of the 6th  
International Conference on Performance Evaluation Methodologies and Tools  
(ValueTools) 2012 for the paper "Analysis of TTL-based Cache Networks",  
joined work with Philippe Nain (his PhD advisor), Giovanni Neglia and Don  
Towsley (who he is currently visiting).

When: Mon Sep 23, 2013 11am – 12pm Eastern Time
Where: MCS-148, 111 Cummington Mall, Boston, MA 02215
Calendar: NRG Calendar
     * Larissa Spinelli - creator

Event details:  

Invitation from Google Calendar: https://www.google.com/calendar/

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