[metrics-team] temporary negative spike in tor relay count: real or bug?

[Karsten Loesing]

Hi Damian,

that sounds like something that would affect advertised-bandwidth
statistics. But the graphs that nusenu linked show absolute relay
numbers which don't rely on self-reported bandwidths.

If you have more details about that negative-bandwidth bug, I'd like to
hear that. It's likely unrelated to this bug, but it might still be a
fun bug. :)

All the best,
Karsten


On 2017-07-16 23:22, Damian Johnson wrote:
> Hi Karsten. For what it's worth someone mentioned seeing a negative
> bandwidth average in nyx recently too. Naturally I thought this was a
> nyx bug but considering this maybe tor itself is generating a negative
> value?
> 
> Just a thought.
> 
> On 7/16/17, Karsten Loesing <karsten at torproject.org> wrote:
>> On 2017-07-15 09:04, nusenu wrote:
>>> Hi,
>>
>> Hi nusenu,
>>
>>> is the massive temporary drop in relays as seen on the platform an
>>> version metrics graphs real?
>>>
>>> https://metrics.torproject.org/platforms.html
>>> https://metrics.torproject.org/versions.html
>>>
>>>
>>> It does not show here:
>>> https://metrics.torproject.org/relayflags.html
>>
>> This is most likely a bug.
>>
>> We recently updated one of the data-processing modules of the Tor
>> Metrics website, which overwrote the configuration file with a blank
>> one. This error went unnoticed for the weekend. Looks like the fix came
>> a few hours after the 72 hour mark for which recent descriptors are
>> available on CollecTor. So, we're missing a few hours of descriptors in
>> the database.
>>
>> I'm now re-importing descriptors since July 1, which should ideally fix
>> this bug. This may take a few more hours. If it doesn't fix the issue
>> over night, I'll take another look tomorrow.
>>
>> As always, thanks for pointing this out!
>>
>>> regards,
>>> nusenu
>>
>> All the best,
>> Karsten
>>
>>
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