any rough stats on bridges ?

[John Case]

On Mon, 19 Oct 2009, Karsten Loesing wrote:

> On 10/19/2009 04:10 PM, John Case wrote:
>> It would be interesting if someone in the know could let us know how
>> many bridges are running ... I'd further be interested in the total
>> number that have been submitted over time, vs. the number that are
>> actually running now ... maybe some rough ideas as to their average
>> bandwidth, etc.
>>
>> My understanding of the protocol leads me to believe that this is benign
>> information.
>
> The latest information that I can give you is from June 22:
>
> https://www.torproject.org/projects/metrics
>
> in particular
>
> https://git.torproject.org/checkout/metrics/master/report/bridges/bridges-2009-06-22.pdf
>
> Let me know if there's something else you are interested in that could
> be extracted from the bridge descriptors, and I can include it in the
> next report.


Thank you.  This was very interesting.

I'd like to see some stats, or even some conjecture, as to the longevity 
of a bridge, and what it means for the bridge to be born, be used, and 
eventually be blocked.

I understand the mechanisms used to slowly feed bridge information to 
people who request them, but even that slowness can't keep them from 
eventually being discovered and blocked.

I would think there would be some kind of exponential falloff in utility 
of a bridge as it is extant for longer and longer periods of time.  You 
might be able to analyze this by looking at the relationship between the 
number of times a bridge IP is given out vs. the bandwidth it generates 
and then provide some guidelines to bridge operators that would give them 
an idea as to when to move to a new IP, or when to expect their bridge to 
have gone stale.
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