Subject: Re: [alto] differences among applications

From: Laird Popkin <[email-masked]>
Date: Wed, 11 Feb 2009 16:16:08 -0500 (EST)

I'd go with "ALTO enables more intelligent app execution via the availability of network and other information". 

This is certainly (as others have pointed out) more broad than p2p swarm file downloads. For example, multi-player games work better when the players are "near" each other, routing VOIP (e.g. Skype) between two firewalled nodes should ideally use a third node that is "near" the other two, CDNs can use the network data to assign CDN servers to users more accurately, etc. 

- Laird Popkin, CTO, Pando Networks 
mobile: 646/465-0570 

----- Original Message ----- 
From: "stefano previdi" <[email-masked]> 
To: "Greg DePriest (NBC Universal)" <[email-masked]> 
Cc: [email-masked] 
Sent: Wednesday, February 11, 2009 4:10:16 PM (GMT-0500) America/New_York 
Subject: Re: [alto] differences among applications 

On Feb 11, 2009, at 10:03 PM, DePriest, Greg (NBC Universal) wrote: 

Makes perfect sense to me. 

Is it fair to say an ALTO server adds intelligence to the network? 
hmmm, it assumes that intelligence comes from the routing layer... looks great to me ;-) 

Or is it more accurate to say that ALTO enables more intelligent app execution via the availability of network [and perhaps other] information? 

yes, this is maybe more accurate... and I like the "perhaps other"... 

s. 

From: Stanislav Shalunov [ mailto:[email-masked] ] 
Sent: Wednesday, February 11, 2009 3:54 PM 
To: DePriest, Greg (NBC Universal) 
Cc: [email-masked] 
Subject: Re: [alto] differences among applications 

That's, to me, the idea of ALTO. The apps using information about ISP routing preferences and the network to improve peer selection. 

Note that this is a very broadly applicable technique: sure, BitTorrent and other P2P apps are most obvious users to begin with, but any sort of app that has a choice of network destinations can benefit. Think along the lines of CDNs, HTTP mirrors, or DNS servers choice, for example. 

On Wed, Feb 11, 2009 at 12:11 PM, DePriest, Greg (NBC Universal) < [email-masked] > wrote: 

Just to be sure: You envision the app selecting peers for specific pieces of content and peer selection will use network data of some type in doing so? 

From: [email-masked] [mailto: [email-masked] ] On Behalf Of Stanislav Shalunov 
Sent: Wednesday, February 11, 2009 2:51 PM 

To: Zoran Despotovic 
Cc: [email-masked] 
Subject: Re: [alto] differences among applications 

As others pointed out, an ALTO protocol is not expected to make peer selections for the apps. On a high level, it's expected to provide information about the network and about ISP routing preferences. 

While peer selection preferences vary from application to application substantially, the network itself is the same, and so the information about it remains valid. 

-- Stas 

On Tue, Feb 10, 2009 at 2:14 AM, Zoran Despotovic < [email-masked] > wrote: 

Hi all, 

I was wondering if and how IETF would address possible differences among relevant P2P applications in the sense that different applications may require totally different solutions. Was there any discussion on this before on the list? 

Just as an example, different criteria to drive peer selection may work differently for give-to-get streaming and tit-for-tat BT. So how will IETF deal with this? Standardize different solutions for different applications? Standardize one solution for all? Pick the most critical (heaviest traffic) applications and standardize a solution for it? 

It makes sense to clarify that at this early stage and, perhaps, first see if the solution should and can be application agnostic or not. 

Best regards, 
Zoran 

-- 
Zoran Despotovic, Ph.D. 
Senior Researcher 

DOCOMO Communications Laboratories Europe GmbH 
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Tel: +49-89-56824-205 Fax: +49-89-56824-300 
http://www.docomoeurolabs.de/ 

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-- 
Stanislav Shalunov 
BitTorrent Inc 
[email-masked] 

personal: http://shlang.com 

-- 
Stanislav Shalunov 
BitTorrent Inc 
[email-masked] 

personal: http://shlang.com 
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