[p2p-hackers] p2p in some place or other

[Greg Bildson]

There are an infinite number of rare files so caching those without future
knowledge about anyone's interest would be costly and infeasible.

Thanks
-greg

> -----Original Message-----
> From: p2p-hackers-bounces at zgp.org [mailto:p2p-hackers-bounces at zgp.org]On
> Behalf Of Serguei Osokine
> Sent: Sunday, December 11, 2005 10:17 PM
> To: Peer-to-peer development.
> Subject: RE: [p2p-hackers] p2p in some place or other
>
>
> On Sunday, December 11, 2005 Travis Kalanick wrote:
> > So far, in my opinion, proactive caching on open p2p networks would
> > provide little temporal benefit in availability and performance,
> > given the inherent costs of such a scheme, and given the availability
> > of high-performance, high-reliability p2p architectures.
>
> 	...and I was on the other side of this debate.
>
> 	My point was that most of content in open P2P networks is
> trapped in the long tail; see, for example:
>
> [1] http://p2pecon.berkeley.edu/pub/CWC-EC05.pdf
>
> and
>
> [2] http://www.mpi-sws.mpg.de/~gummadi/papers/p118-gummadi.pdf
>
> - the number of copies of the average file is truly pathetic. As a
> result, the average download experience is slow and unreliable. For
> example, the study [2] suggests than in 2002 as many as two thirds of
> "transactions" (HTTP requests for a single data chunk) used to fail
> in Kazaa. [Presumably due to the source host overload - Oso]
>