[p2p-hackers] Re: scalability

[Daniel Stutzbach]

Perhaps we should take a cue from TCP/IP and start referring to the
"Gnutella protocol suite".

On Fri, Dec 02, 2005 at 04:11:53PM -0500, Sam Berlin wrote:
> The protocol, as described nearly anywhere, isn't Gnutella.  Gnutella,
> as others have said, really isn't a protocol (0.6 or any number)
> anymore.  It's a hodgepodge of a lot of features, all implemented by
> various Gnutella clients.  Partial file sharing has been in use by
> mainstream clients for around 1-2 years.
> 
> As Greg mentioned, academic papers tend to describe Gnutella as it was
> designed by Justin Frankel, and a few will include the addition of
> ultrapeers.  It's nearly impossible to find a paper that accurately
> describes the current state of the network  (as it exists through
> mainstream clients) though.
> 
> It'd likely be a fascinating subject for researchers to study & write
> papers on.  I know I'd be interested.
> 
> Sam
> 
> On 12/2/05, Bryan Turner <bryan.turner at pobox.com> wrote:
> >        Ah, this is news to me :)  Thanks for the link.  I notice that this
> > partial file transfer feature is only a footnote on the main protocol..  How
> > wide spread is the partial file transfer feature among clients?
> >
> > bryan.turner at pobox.com
> >
> > From: p2p-hackers-bounces at zgp.org [mailto:p2p-hackers-bounces at zgp.org] On
> > Behalf Of Daniel Stutzbach
> > Sent: Friday, December 02, 2005 3:22 PM
> > To: 'Peer-to-peer development.'
> > Subject: Re: [p2p-hackers] Re: scalability
> >
> > On Fri, Dec 02, 2005 at 03:15:45PM -0500, Bryan Turner wrote:
> > > Gnutella (I believe) doesn't meet #2,3 and partially #4,5:
> > >       #2 because it does not cluster related data it will eventually
> > >               be overwhelmed with content.
> > >       #3 because it performs full-file transfers instead of block
> > >               exchanges or partial file transfers
> > >       #4/5 because clients don't immediately offer partial downloads,
> > >               thus hot spots have a congestion delay measured in
> > >               full-file-transfer increments rather than in block
> > >               increments (an order of 2 for typical MP3s, easily
> > >               reaching multiple days of congestion).
> >
> > If I am not mistaken, Gnutella has been doing partial file transfers for two
> > or three years now.  The eDonkey/eMule network does this too.
> >
> > BitTorrent does not have a monopoly on this feature. :-)
> >
> > The relevant spec (if it can be called a spec) for Gnutella is here:
> >
> > http://www.the-gdf.org/wiki/index.php?title=Partial_File_Sharing_Protocol
> >
> >
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-- 
Daniel Stutzbach                           Computer Science Ph.D Student
http://www.barsoom.org/~agthorr                     University of Oregon