[p2p-hackers] Hard question....

gbildson at limepeer.com gbildson at limepeer.com
Sun Apr 2 02:52:31 UTC 2006


I'm gonna go with _no_.  The amount of time it is saturated is just a blip.

Thanks
-greg
Quoting David Barrett <dbarrett at quinthar.com>:
> That makes sense, but it's a bit of a catch-22:
>
> In order to not saturate the connection you need to know what's available.
> But to know what's available, you need to saturate the connection.
>
> I'm curious if there's another way.
>
> -david
>
> > -----Original Message-----
> > From: gbildson at limepeer.com [mailto:gbildson at limepeer.com]
> > Sent: Saturday, April 01, 2006 6:14 PM
> > To: Peer-to-peer development.; David Barrett
> > Cc: 'Peer-to-peer development.'
> > Subject: RE: [p2p-hackers] Hard question....
> >
> > I've missed part of this conversation but here is my two cents on this
> > specific
> > question -  just keep increasing the amount of data that you are sending
> > in
> > bursts and the speed of those bursts until you achieve a certain target
> > error
> > rate.  i.e. 2% or whatever.  After bumping up against failures, you should
> > be
> > able to get a sense of an optimal rate.  Be sensitive to TCP congestion at
> > the
> > same time.  I back off if the round trip time starts spiking.
> >
> > Thanks
> > -greg
> >
> >
> > Quoting David Barrett <dbarrett at quinthar.com>:
> > > > -----Original Message-----
> > > > From: coderman
> > > > Sent: Saturday, April 01, 2006 5:20 PM
> > > > To: Peer-to-peer development.
> > > > Subject: Re: [p2p-hackers] Hard question....
> > > >
> > > > On 4/1/06, David Barrett <dbarrett at quinthar.com> wrote:
> > > > > ...
> > > > > Incidentally, how are you measuring "available bandwidth"?
> > > >
> > > > right now i pass the buck and let the user pick a suitable limit.  if
> > > > excessive loss is detected continuously the stack can cut by half or
> > > > exit with error.
> > > >
> > > > i'm still looking for better ways to do this; ideally it would be tied
> > > > to kernel level shaping and based on a historical view of channel
> > > > capacity.
> > >
> > > Got it.  Has anyone else had good experience trying to measure this
> > > automatically in the real world?
> > >
> > > -david
> > >
> > >
> > > _______________________________________________
> > > p2p-hackers mailing list
> > > p2p-hackers at zgp.org
> > > http://zgp.org/mailman/listinfo/p2p-hackers
> > > _______________________________________________
> > > Here is a web page listing P2P Conferences:
> > > http://www.neurogrid.net/twiki/bin/view/Main/PeerToPeerConferences
> > >
> >
>
>
> _______________________________________________
> p2p-hackers mailing list
> p2p-hackers at zgp.org
> http://zgp.org/mailman/listinfo/p2p-hackers
> _______________________________________________
> Here is a web page listing P2P Conferences:
> http://www.neurogrid.net/twiki/bin/view/Main/PeerToPeerConferences
>






More information about the P2p-hackers mailing list