[Pdns-users] ixfr support for slaves with large zones
ktm at rice.edu
Thu Mar 19 17:21:29 UTC 2009
On Thu, Mar 19, 2009 at 03:52:34PM +0100, Sean Boran wrote:
> I have a pdns slave to a very large zone (and I do not have administrative
> access to the master server), where the serial changes almost every second.
> This means that the entire zone keeps being sent. The ixfr protocol, seems
> to be the solution in that only the changes to a zone would be propagated.
> However, when I search for pdns support for ixfr I dind't much much execpt a
> patch two years ago to answer ixfr queries and force full transfers.
> So ixfr is not yet supported, is that correct?
> Thanks in advance,
> Sean Boran
That is correct, IXFR is not supported so pdns falls back to using
AXFR for the transfer. I had posted a patch to at least allow for
the DB update process to be optimized a few years ago. This kept
the DB backend from being overrun by the AXFR updates. It sounds
like your best bet is to script/cron the update to occur periodically
instead of every second to manage the I/O. Good luck.
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