[Pdns-users] Virtual servers in pdns-recursor

[Miguel Miranda]

10 instances ??
Im experimenting with 4 recursor instances because I have plenty of cpu and
ram:

top - 16:20:08 up 8 days,  7:36,  3 users,  load average: 0.06, 0.05, 0.05
Tasks: 383 total,   1 running, 382 sleeping,   0 stopped,   0 zombie
Cpu(s):  5.5%us,  2.5%sy,  0.0%ni, 91.4%id,  0.1%wa,  0.0%hi,  0.6%si,
 0.0%st
Mem:  32867864k total,  4847800k used, 28020064k free,   149300k buffers
Swap: 16506872k total,        0k used, 16506872k free,  1395864k cached


dnsdist is reporting around 1200 qps at peak hours, should i benefit with
more simultaneous instances? if so, how many? Im starting to beleive this
server is oversized for the dns traffic our customers are demanding, what
do you think?

On Fri, Jan 8, 2016 at 3:54 PM, Thomas Mieslinger <miesi at pc-h.de> wrote:

> Am 08.01.2016 um 17:56 schrieb Nick Williams:
>
>> On Jan 8, 2016, at 9:46 AM, Pieter Lexis <pieter.lexis at powerdns.com>
>> wrote:
>>
>>>
>>> [..]
>>>> /etc/init.d/pdns-recursor-balancer1 start.
>>>>
>>>
>>> You'll need to add '--config-name'[1] to command line options
>>> pdns_recursor in the init-script. Virtual hosting as done by the
>>> authoritative server is not supported with the recursor init-script.
>>>
>>
>> FWIW, this would be a good application for containers, such as Docker
>> containers.
>>
>
> I run 10 pdns_recoursor instances on each of my recursive server boxes.
> I'm (still) using a distro with upstart so I just need a short
> /etc/init/pdns-recursor.conf
>
> --snip--
> description "pdns instance $INSTANCE"
>
> stop on runlevel [016]
>
> respawn
>
> instance $INSTANCE
>
> exec /usr/sbin/pdns_recursor --daemon=no
> --config-dir=/etc/pdns-recursor/$INSTANCE --config-name=$INSTANCE
> --socket-dir=/var/run/pdns-recursor/$INSTANCE
> --snap--
>
> and can as many instances as I have CPU and ram. initctl list nicely lists
> all running instances... restarts failed processes etc.
>
> Copying sysV initscripts around is not elegant, but with well written
> upstart/systemd/svcadm configuration there is absolutely no reason to wrap
> docker around pdns_recursor or pdns.
>
> Sorry
>
> Thomas
>
>
>
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