Network end users to pull down 2 gigabytes a day, continuously?

Sun Jan 7 14:09:27 UTC 2007

Dear Colm;

On Jan 7, 2007, at 8:50 AM, Colm MacCarthaigh wrote:

>
> On Sat, Jan 06, 2007 at 08:46:41PM -0600, Frank Bulk wrote:
>> What does the Venice project see in terms of the number of upstreams
>> required to feed one view,
>
>

<snip>

>> Supposedly FTTH-rich countries contribute much more
>> to P2P networks because they have a symmetrical connection and are  
>> more
>> attractive to the P2P clients.
>>
>> And how much does being in the same AS help compare to being  
>> geographically
>> or hopwise apart?
>
> That we don't yet know for sure. I've been reading a lot of  
> research on
> it, and doing some experimentation, but there is a high degree of
> correlation between intra-AS routing and lower latency and greater
> capacity. Certainly a better correlation than geographic proximity.
>

As is frequently pointed out, here and elsewhere, network topology !=  
geography.

> Using AS proximity is definitely a help for resilience though, same-AS
> sources and adjacent AS sources are more likely to remain reachable in
> the event of transit problems, general BGP flaps and so on.
>

Do you actually inject any BGP information into Venice ? How do you  
determine otherwise
that two nodes are in the same AS (do you, for example, assume that  
if they are in the same /24
then they are close in network topology) ?

> -- 
> Colm MacCárthaigh                        Public Key: colm 
> +pgp at stdlib.net

Regards
Marshall