[metrics-team] Discontinuity on bridge numbers

[Karsten Loesing]

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.

All the best,
Karsten

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