Re: [tor-dev] Scaling bandwidth scanner results

[Tom Ritter <tom@xxxxxxxxx>]

After #1 is decided, we can convert past bwauth data, can't we?  If
it's helpful I can (at some point) compare your data against
historical (converted) data as I've been doing:
https://tomrittervg.github.io/bwauth-tools/

-tom

On 18 March 2018 at 20:22, Matt Traudt <pastly@xxxxxxxxxxxxxx> wrote:
> I've made some good progress on a bare bones, doesn't-do-more-than-it-
> has-to bandwidth scanner. It can generate output just like torflow[0].
>
> We need to decide on how to scale results that come from different
> measurement systems. The simple, don't-make-it-harder-than-it-has-to-be
> idea is (quote [1], see [2]):
>
>> Express each weight as a proportion of the total, and multiply by
> some agreed total (e.g. for the current network it would have to be the
> total of the consensus weight, but within some limited range to avoid
> unbounded growth).
>
> So we need to:
>
> 1. Decide on a large total.
>
> I suggest 50 million to start the conversation (bike shedding) based on
> that being close to the current total consensus weight so relay
> operators won't see a large (though inconsequential) change.
>
> 2. Have all the torflow operators switch to this new method.
>
> Ouch. I wouldn't mind being told I'm wrong about this step being
> necessary.
>
> 3. Find all the places that hint at consensus weight being directly
> comparable to bandwidth (such as [3]) and change the wording.
>
> Matt
>
> [0]: https://paste.debian.net/1015409/
> [1]: https://trac.torproject.org/projects/tor/wiki/org/meetings/2018Rom
> e/Notes/BandwidthAuthorityRequirements#Scaling
> [2]: https://trac.torproject.org/projects/tor/ticket/25459
> [3]: https://gitweb.torproject.org/torspec.git/tree/dir-spec.txt#n2290
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