Re: [p2pi] Information in an ALTO protocol

I think Vinay may mean the last-hop upload bandwidth for the local peer to
select among candidates.
The we can imagine two phases.
At first phase ALTO may prefer to response with remote peers with larger
nominal last-hop cap.
Secondly, it leaves to the local peer to probe for the real available
bandwidth among them and take the best scheduling for piece retrieval.
Maybe it will drop some peers with low consumption upload bandwidth.

On Mon, Aug 11, 2008 at 11:00 PM, Lars Eggert <lars.eggert@nokia.com> wrote:

> Hi,
>
> On 2008-8-11, at 17:35, ext Vinay Aggarwal wrote:
>
>> I think an estimate of "last-hop bandwidth" can be an interesting metric
>> of information for peer selection.
>> It has been shown that selecting peers with high last-hop bandwidth lead
>> to improvements in download performance. And this is information that is
>> rather hard for peers to find out themselves. As far as I can see, it
>> also satisfies all the bars set up by the ALTO service.
>>
>
> Uplink or downlink bandwidth?
>
> Provisioned bandwidth (i.e., the nominal bandwidth a user is paying for) or
> the currently available fraction of it? The latter would be something that I
> doubt an ALTO box can have an accurate view of, since it changes on short
> timescales.
>
> Could you share a reference to papers that show that that information is
> beneficial?
>
> Thanks,
> Lars
>
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