[dnsdist] dnsdist performance
remi.gacogne at powerdns.com
Thu Aug 8 13:22:38 UTC 2019
Please keep replying to the mailing-list instead of replying to me
directly, as your answers might help others. I have not included your
message because I'm not sure what you expected to share publicly, but we
only do non-public support for customers .
Would you consider sending metrics to our public metronome server 
so we understand what's the limiting factor during your tests? You only
need to add a line like this one to your dnsdist configuration:
This will only send some metrics without any private information and is
very useful to understand where the bottleneck may be.
> On Thu, 8 Aug 2019 at 10:52, Remi Gacogne <remi.gacogne at powerdns.com
> <mailto:remi.gacogne at powerdns.com>> wrote:
> Hi Gentian,
> On 8/8/19 10:20 AM, Gentian Bajraktari wrote:
> > but when we test with resperf (from dnsperf tool), the results are
> > bad for DNSDIST, around 5-15K QPS , while when we test directly to one
> > of BIND ip addresses the QPS goes up to 50-60Qps.
> Those are very low numbers, for dnsdist but also for Bind (assuming you
> mean 50-60k qps), on what hardware are you testing this? Is this a VM?
> > we have tried both rpm install of dnsdist, compiling from source and
> > even comiling the concur version but all with similar results, ie when
> > resperf tests go through dnsdist the results are much lower in
> terms of qps.
> Knowing the exact version of dnsdist would help a lot.
> Did you read the tuning guide ? At the very least you should set
> setMaxUDPOutstanding(65535). You are also using a single thread for
> receiving UDP queries which might not be what you want, although you
> should get much more than 15k qps even with a single thread.
> > OS is Centos7 in all servers, tweaked all settings for file
> limits, udp
> > connections etc.
> Did you disable any firewall? Remove any connection tracking modules? It
> would be very useful to know exactly what you tweaked.
> : https://dnsdist.org/advanced/tuning.html
> Best regards,
> Remi Gacogne
> PowerDNS.COM BV - https://www.powerdns.com/
> dnsdist mailing list
> dnsdist at mailman.powerdns.com <mailto:dnsdist at mailman.powerdns.com>
PowerDNS.COM BV - https://www.powerdns.com/
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