[metrics-team] Discontinuity on bridge numbers

[David Fifield]

On Mon, Jul 30, 2018 at 08:34:52PM +0200, Karsten Loesing wrote:
> On 2018-07-30 19:55, David Fifield wrote:
> > On Mon, Jul 30, 2018 at 05:16:00PM +0000, nusenu wrote:
> >> Vinicius Fortuna [vee-NEE-see.oos]:
> >>> I noticed there's some discontinuity on the Bridge number data:
> >>> https://metrics.torproject.org/bridges-ipv6.html
> >>> https://metrics.torproject.org/networksize.html
> >>>
> >>> Do you know what happened there?
> >>
> >> the bridge authority got replaced, since this
> >> wasn't a smooth transition it resulted in a lot of
> >> lost bridges because they did not upgraded their tor version
> >> which contains the new bridge authority to pubish to.
> > 
> > I think the new bridge authority is not the whole story, because the
> > bridge authority change happened on 2018-07-14, but the missing data
> > begins on 2018-07-07 (and ends on 2018-07-21).
> 
> Hmm? What makes you think the gap ends on 2018-07-21? In the two graphs
> linked above the line comes back on 2018-07-13. Are you maybe looking at
> a cached version of those graphs? It took us a few days to import the
> new bridge descriptors into Tor Metrics, but AFAIK we did not miss any data.

I'm looking at
https://metrics.torproject.org/userstats-bridge-country.html (https://archive.is/AQ9Mh)
https://metrics.torproject.org/userstats-bridge-combined.html (https://archive.is/cQa3e)