A DNS-based Client Redirector for the Apache HTTP Server
Author: Michal Szymaniak
Source: Masters thesis, Vrije Universiteit, July 2002.
Abstract
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The client redirection problem is one of the most fundamental
issues when developing a Content Delivery Network (CDN). This
thesis discusses three known solutions and describes the
implementation of one of them, which exploits a special DNS
protocol implementation. The system consists of a special module
for the Apache HTTP Server, which supports the basic functions
of a typical DNS server. The module generates custom DNS
responses based on network distance calculations according to
the AS-path length metric. The Internet topology information
required to compute the AS-path length metric is derived from
BGP routing tables. Performance measurements prove that the
overhead introduced by the network distance calculations is
negligible in comparison to the overall DNS request-reply delay.
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Download
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The thesis, in gzipped Postscript (409,680 bytes). |
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The thesis, in PDF (1,207,877 bytes). |
See Also
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The Globule project implements the ideas described in this thesis. |
Bibtex Entry
@MastersThesis{Szymaniak2002,
author = {Michal Szymaniak},
title = {A DNS-based Client Redirector for the Apache HTTP Server},
school = {Vrije Universiteit},
address = {Amsterdam, The Netherlands},
year = {2002},
month = jul
}
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gpierre@cs.vu.nl
Last modified: Thu Feb 12 15:39:19 2004