[atlas] Support for arbitrary DNS queries

Thank you very much, makes perfect sense. Can we increase the timeout
somehow or specify it as a tunable query parameter? I find the OARC tester
highly useful in conjunction with RIPE ATLAS.
On Dec 26, 2015 12:24 PM, "Anand Buddhdev" <anandb at ripe.net> wrote:

> On 24/12/15 10:59, Gil Bahat wrote:
>
> Dear Gil,
>
> > Unfortunately, this doesn't seem to work so well either:
> > https://atlas.ripe.net/measurements/3115499/
> > Can anyone here help me figure out why almost all requests end up being
> > null and only very few of them show up the resultant TXT record?
>
> The OARC reply-size tester works by sending a recursive resolver a
> series of CNAME records to follow. If the resolver has no problems, then
> it follows the chain quickly, and gets a result. However, if there are
> path MTU issues, for example, these queries time out. In this case, a
> resolver will take a long time to come back with the result.
>
> The RIPE Atlas DNS measurements all time out after 5 seconds, and this
> isn't enough time to always get results from the reply-size tester. This
> is most likely the reason why most of your results are empty, with a
> "timeout" error.
>
> Regards,
> Anand
>
>
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