[tor-talk] traffic down

[Roger Dingledine]

On Sat, Dec 15, 2012 at 10:24:51AM +0100, Udo van den Heuvel wrote:
> On 2012-08-15 15:16, Udo van den Heuvel wrote:
> >> So if you have less than 32KB/s of bandwidthrate, you won't get
> >> the Fast flag, and basically all the clients will ignore you.
> > 
> > So there was a change in this mechanism?
> > I'll see if I can adapt the config to that...
> 
> See http://pindarots.xs4all.nl/mrtg/tor.html
> Traffic is down again.
> 
> I have 'BandwidthRate 32 KB' and that worked but not any longer?
> What is wrong?

The directory authorities assign the Fast flag to the top 7/8s of
relays by bandwidth:
https://gitweb.torproject.org/torspec.git/blob/HEAD:/dir-spec.txt#l1623

Lately this cutoff has been around the 40KB mark.

It's an area of active research what the relationship is between this
"minimum bandwidth cutoff" and the resulting performance changes:
https://trac.torproject.org/projects/tor/ticket/1854
but I am increasingly suspecting that raising it to 100KB or even 500KB
would produce an improvement.

--Roger