[hobbit] DNS resolution duration

[Josh Luthman]

Great information!  I'll put this stuff into place and come back to this if
I have further issues.

Thanks a bunch, everyone!

On 2/12/08, Great D Dilla <great.dilla at gmail.com> wrote:
>
> As for /etc/resolv.conf, if you have more than 1 DNS servers in the
> network,
> putting the following lines "spreads" the load across the servers:
>         option timeout:x (x which is in seconds)
>         option rotate (not having to always query the first nameserver,
> but
> to rotate the list)
>
> Afterward check if things improve. It did for me before.
>
> Of course, having a local caching DNS daemon will be the best solution.
>
> Hope this helps you out.
>
>
> -----Original Message-----
> From: Henrik Stoerner [mailto:henrik at hswn.dk]
> Sent: Wednesday, February 13, 2008 5:45 AM
> To: hobbit at hswn.dk
> Subject: Re: [hobbit] DNS resolution duration
>
> On Tue, Feb 12, 2008 at 10:52:41AM -0500, Josh Luthman wrote:
> > DNS lookups completed                    1202826251.058136
> 0.072268
> >
> > But now when there is a problem reaching the DNS server (I have two in
> > /etc/resolv.conf) it spikes up to...
> >
> > DNS lookups completed                    1202825989.913910
> 40.001908
> >
> > Is there any way to set the DNS resolution timeout to something
> > smaller?  Has anyone tried running bind9 on the Hobbit box itself and
> having
> > it hold cache locally?
>
> Hobbit does have a tendency of hitting DNS servers pretty hard. I would
> definitely recommend using a local caching DNS server on your Hobbit
> box. It is dead simple to setup, and it makes DNS lookups a lot faster
> and more reliable.
>
> As far as the timeouts are concerned, the bbtest-net(1) man-page lists
> this option:
>
>         --dns-timeout=N (default: 30 seconds)
>
> This assumes you're using Hobbit's built-in resolver library, C-ARES. If
> you're running bbtest-net with the --no-ares option, there is no way
> Hobbit can control the DNS lookup settings.
>
>
> Regards,
> Henrik
>
>
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>


-- 
Josh Luthman
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Those who don't understand UNIX are condemned to reinvent it, poorly.
--- Henry Spencer
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