I-D Action: draft-jenkins-alto-cdn-use-cases-01.txt
internet-drafts@ietf.org Fri, 17 June 2011 13:05 UTC
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Subject: I-D Action: draft-jenkins-alto-cdn-use-cases-01.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Use Cases for ALTO within CDNs
Author(s) : Ben Niven-Jenkins
Grant Watson
Nabil Bitar
Jan Medved
Stefano Previdi
Filename : draft-jenkins-alto-cdn-use-cases-01.txt
Pages : 14
Date : 2011-06-17
For some time, Content Distribution Networks (CDNs) have been used in
the delivery of some Internet services (e.g. delivery of websites,
software updates and video delivery) as they provide numerous
benefits including reduced delivery cost for cacheable content,
improved quality of experience for end users and increased robustness
of delivery.
In order to derive the optimal benefit from a CDN it is preferable to
deliver content from the servers (caches) that are "closest" to the
End User requesting the content, where "closest" may be as simple as
"geographical or network distance" combined with CDN server load
within a location, but may also consider other more complex
combinations of metrics and CDN or Network Service Provider (NSP)
policies.
There are a number of different ways in which a CDN may obtain the
necessary network topology and/or cost information to allow it to
serve End Users from the most optimal servers/locations, such as
static configuration, passively listening to routing protocols
directly, active probing of underlying network(s), or obtaining
topology and cost by querying an information service such as the ALTO
map & cost services.
This document describes the use cases for a CDN to be able to obtain
network topology and cost information from an ALTO server(s).
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-jenkins-alto-cdn-use-cases-01.txt
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
This Internet-Draft can be retrieved at:
ftp://ftp.ietf.org/internet-drafts/draft-jenkins-alto-cdn-use-cases-01.txt
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