Re: [p2pi] WG Review: Application-Layer Traffic Optimization (alto)

Nicholas Weaver <nweaver@ICSI.Berkeley.EDU> Tue, 14 October 2008 14:57 UTC

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From: Nicholas Weaver <nweaver@ICSI.Berkeley.EDU>
To: Lars Eggert <lars.eggert@nokia.com>
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Subject: Re: [p2pi] WG Review: Application-Layer Traffic Optimization (alto)
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On Oct 14, 2008, at 7:40 AM, Lars Eggert wrote:
>
> FYI, there's at least one more proposal in this space: the Ono stuff  
> from Northwestern (http://www.aqualab.cs.northwestern.edu/projects/Ono.html 
> ). There was a paper at SIGCOMM this year, and their system has the  
> interesting feature that it simply freeloads of Akamai's DNS entries  
> in order to determine who's close to whom. No "ALTO boxes" needed.

Basically, this is freeloading on the akamai DNS infrastructure to  
create a "topology oracle": which nodes are close in terms of network  
topology as a common proxy for bandwidth.

It doesn't need "ALTO boxes" only because someone else has colleced  
that information, and that there is a separation between the query  
replying infrastructure (through DNS) and the measurement  
infrastructure.

However, it does bring up a good point:  DNS games allow the ability  
to divorce the measurement infrastructure from the reporting  
infrastructure, and to create a reporting infrastructure that can  
always work both with and without ISP cooperation.


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