Zone reload time after NOTIFY
Casey.Scott at wizards.com
Tue May 23 23:31:38 UTC 2006
> -----Original Message-----
> From: Ken Eddings [mailto:eddingsk at apple.com]
> Sent: Tuesday, May 23, 2006 4:11 PM
> To: Scott, Casey; Barry Margolin; comp-protocols-dns-bind at isc.org
> Subject: RE: Zone reload time after NOTIFY
> At 2:58 PM -0700 5/23/06, Scott, Casey wrote:
> > > -----Original Message-----
> >> From: bind-users-bounce at isc.org
> >> [mailto:bind-users-bounce at isc.org] On Behalf Of Barry Margolin
> >> Sent: Tuesday, May 23, 2006 1:58 PM
> >> To: comp-protocols-dns-bind at isc.org
> >> Subject: Re: Zone reload time after NOTIFY
> >> In article <e4vk94$48s$1 at sf1.isc.org>, "Scott, Casey"
> >> <Casey.Scott at wizards.com> wrote:
> >> > I have a BIND machine configured as a secondary server
> with 1 zone.
> >> > The zone can receive many DDNS update from Windows clients.
> >> The DDNS
> >> > updates occur on the primary server, which is Windows 2003. My
> >> > question is that although the primary DNS server sends
> >> NOTIFY's to the
> >> > BIND server, the BIND server takes quite a while before it
> >> implements any of the changes.
> >> > I can not find any BIND config option that will effect the
> >> > responsiveness of BIND to NOTIFY's. I don't want to
> force BIND to
> >> > reload the zone for every NOTIFY, but I would like to have some
> >> > control over the amount of time taken to implement the
> >> changes in the zone.
> >> What is "quite a while"? BIND waits a random amount of time, to
> >> avoid a thundering herd problem if all the slaves tried to
> >> immediately.
> >> But this shouldn't be much more than a minute, I think.
> >> --
> >> Barry Margolin, barmar at alum.mit.edu
> >> Arlington, MA
> >> *** PLEASE post questions in newsgroups, not directly to me ***
> >> *** PLEASE don't copy me on replies, I'll read them in the
> group ***
> >Its been between 15-30 minutes each time. BIND is installed
> from RPM,
> >and running on a RHEL 4 machine.
> Have you verified that the NOTIFY is being received on the
> slaves? Sound's like they're not getting through and normal
> refresh cycle is taking care of the updates.
> Ken Eddings, Hostmaster, IS&T, eddingsk at apple.com,
> eddingsk at mac.com
> Work:+1 408 974-4286 Pager: +1 408 699-3591, Fax: +1 408 974-3103
> Apple Computer, Inc., 1 Infinite Loop, M/S 60-MS Cupertino,
> CA 95014 The Prudent Mariner never relies solely on any
> single aid to navigation.
Yes, I watch the NOTIFY's being logged by the slaves. They come
in near-realtime of any changes to the zone. The refresh value is
3hr, so the updates are occurring more frequently than refresh
would allow for.
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