Re: [p2pi] Real life torrent statistics

How many ASes does the overlay span totally? It seems the hotspot effect is
not very obvious as compared to previous study. What about cluster effect of
overlay by which I mean the ratio of neighbors of the peer in the same AS or
ISP?
2008/8/18 Stas Khirman <stas@khirman.com>

>  To estimate a feasibility of ALTO/P4P for real life torrents , I
> collected <ip,port> information for peers from one of the most popular
> "PirateBay" torrents ( almost 20k peers) and maped their IPs to corresponded
> ASs. Please find attached my working notes with some interesting statistics.
>
>
>
> In short – for such kind of swarm (20k peers), almost half of peers belong
> to ASs with 100 or more peers, almost 2/3 of peers belong to ASs with 50 or
> more peers. Less then 15% of peers belong to ASs with 10 or less
> "neighbors".
>
>
>
> US broadband ISPs (Road Runner, Comcast, AT&T) have about 2-3% of total
> peers each.
>
>
>
> Also, I find it surprising geo distribution of the peers – majority were in
> UK , not in US (probably because content is available in US theaters).
>  Places 3-5 taken by Sweden, Poland and Canada (in total – more peers then
> in US).
>
>
>
> Certainly, observed "heavy" neighboring of peers is a function of swarm
> size. I intend to investigate a few medium/small size swarms to have a
> multi-point picture for any future discussions.
>
>
>
> I would appreciate comments, corrections and additional ideas on data
> collection and analysis.
>
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-- 
Cheers,Hao

Fudan University