[Tech] Backoff considered harmful?

[toad]

On Sun, Nov 26, 2006 at 12:19:16PM -0500, Ed Tomlinson wrote:
> On Sunday 26 November 2006 11:23, Michael Rogers wrote:
> > Ed Tomlinson wrote:
> > > Throtting alone seems to work better though.  I wonder if we should disable the
> > > backoff logic and see what happens.  If we trust your simulations, we should not
> > > see much of a difference at all.
> > 
> > I haven't had a chance to investigate heterogeneous capacity yet - 
> > backoff might be useful for avoiding unusually slow nodes without 
> > throttling the whole network to the speed of the slowest nodes.
> 
> I think the above question is a very very important one.  The other
> aspect of it is how does non symmetric bandwidth affect the network?
> eg. if we are basing send rates on average recieve rates from nodes
> with much less output bw than input we may be wasting lots of bw...
> What would happen if we only sent to one peer at a time (queueing
> other messages) or what would happen if we used peek recieve
> rates instead of average?

Not sure I understand what you are suggesting.
> 
> Thanks
> Ed
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