Exit Balancing Patch

Mike Perry mikeperry at fscked.org
Thu Jul 26 19:01:55 UTC 2007

Thus spake Mike Perry (mikeperry at fscked.org):

> > Given that a tor circuit is only as fast as its slowest node isn't it just as 
> > likely that for some reasonable percentage of the time, the user's circuit's 
> > will still be problematically slow (e.g. fast guard, slow relay, fast exit)?

Oh, also, I missed pointing out another key assumption on balancing,
since choice is weighted proportionally to bandwidth, increasing the
bw capacity of these other nodes will cause users to choose them more
often instead of the slower nodes, so it's not like the 10KB/sec nodes
will just magically provide more bandwidth forever to support this
rebalancing. The system will reach a new equilibrium, at which point
more measurements will be needed to hunt down other, more subtle
issues that are hiding behind the noise of these larger ones (such as
liars, path biasers, potential uptime selection balancing issues,
balancing directory vs tor traffic, etc).

Mike Perry
Mad Computer Scientist
fscked.org evil labs
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