[Dnsmon-test] Second update to DNSMON + retries of DNS queries + 9AM outage

Fri Feb 14 08:33:18 CET 2014

* Anand Buddhdev <anandb at ripe.net> [2014-02-13 17:46 (+0100)]:
> On 13/02/2014 17:16, Chris Amin wrote:
> 
> Hi Christopher,
> 
> > In addition, we have changed a line in the testers page in the section
> > comparing the old and the new DNSMON implementations. We previously
> > stated that the RIPE Atlas measurements are not retried on failure
> > (whereas the old TTM boxes do carry out retries). However, RIPE Atlas
> > has gained the ability to carry out an arbitrary number of retries, and
> > uses a value of 10 by default. The data that we have collected so far
> > for the new DNSMON, and the visualisations, are therefore based on this
> > methodology.
> > 
> > We don't want to immediately change to using 0 retries, nor do we want
> > to change to match the exact settings of the old DNSMON, without
> > gathering feedback from you. So if you have a strong opinion on this,
> > please let us know.
> 
> I'm speaking here as a DNS server operator, and not as a staff member. I
> prefer measurements to NOT use retry, so that if there is an issue with
> my DNS servers, I can see it quickly. If a probe uses retries, then it
> will hide operational issues.

+1 from operators point of view. (Although a high latency or RTT might
also indicate operational issues.)

Regards,
Arsen Stasic
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