Joshua Smith juicewvu at
Thu Dec 13 12:11:12 UTC 2007

I suppose I didn't consider the case of having more than a couple of
hundred zones.  Or how much easier it would be to write some sort of
front end to shove the data into a database instead of manipulating
zone files.

Thanks for all of the great info.


On Dec 13, 2007 5:55 AM, Graeme Fowler <graeme at> wrote:
> On Wed, 2007-12-12 at 15:02 -0500, Joshua Smith wrote:
> > I guess I'm a little out of the loop, but the first thing I've heard
> > about bind-dlz was from the thread by gnello.dsouza at,
> > entitled bind-dlz testing.  I am curious to know what the possible
> > advantages of storing your zone data in a mysql database are?  It just
> > seems like a source of additional over head and complexity to me.
> I used an older version of DLZ to build a multiple-frontend high
> availability database-backended DNS system for a large domain registrar
> providing authoritative (apparently!) services for something in excess
> of a million domains.
> When we got to approx 550,000 "normal" domains - in zone files - we hit
> several problems, not least of which was the fact that even on
> high-powered hardware BIND took somewhere in the region of 20 hours to
> start up. With DLZ this became a matter of seconds, and changes in zones
> were reflected instantly instead of waiting for a zone reload.
> Yes, there was additional overhead and complexity but the flexibility
> and improvement in service brought about by making a DB do the work
> instead of BIND was well worth it.
> Graeme

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