Hi Abel,

On 1/17/13 9:00 PM, Abel Luck wrote:

Question: How does proposal 207 (relay fetching through entry guards) affect the user metric data?

Good thinking. AFAICS, accuracy of user estimates shouldn't be affected by the introduction of directory guards. It may be that some relays will see an even higher fraction of directory requests than they see now, but we already keep into account that directory requests aren't equally distributed. See these two tech reports for more details:

https://research.torproject.org/techreports/countingusers-2010-11-30.pdf

https://research.torproject.org/techreports/counting-daily-bridge-users-2012...

Is it possible to keep that data accurate (for the current value of accurate)?

For the current value of accurate, yes. :)

There's even room for improvement, both for current data and for the situation with directory guards. The last section of the second tech report above has more details. Any help would be much appreciated!

Best, Karsten