Re: [Samba] Samba with BIND9 DLZ affecting internet speed
- Date: Fri, 07 Dec 2018 10:26:12 +1300
- From: Andrew Bartlett via samba <samba@xxxxxxxxxxxxxxx>
- Subject: Re: [Samba] Samba with BIND9 DLZ affecting internet speed
On Thu, 2018-12-06 at 22:08 +0200, Zdravko Zdravkov via samba wrote:
> Hi folks.
> I've just experienced strange behaviour with our samba ad configured with
> bind9 dlz and our ftp server (separate machine on the same network).
> In the past few days I've noticed significant drop of the download speed
> from the ftp server.
> As nothing obvious came to my mind I just rebooted our samba AD server.
> Afterwards the speed increased about 9 times, back to what we are used to.
> The ftp server uses the samba AD as dns. That's the only connection between
> the two machines.
> I'm wondering if anyone else can report such troubles or the issue is here
Each DNS lookup takes the Samba DB lock, no matter what the zone. This
appears to be the main issue here.
We need to cache the list of zones we have so we don't need to get the
In the meantime, set your FTP server to reference a caching BIND9 that
only forwards the Samba zone to the Samba DC.
Andrew Bartlett http://samba.org/~abartlet/
Authentication Developer, Samba Team http://samba.org
Samba Developer, Catalyst IT http://catalyst.net.nz/services/samba
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