Zone reload time after NOTIFY

[Scott, Casey]

> -----Original Message-----
> From: bind-users-bounce at isc.org 
> [mailto:bind-users-bounce at isc.org] On Behalf Of Barry Finkel
> Sent: Wednesday, May 24, 2006 12:15 PM
> To: bind-users at isc.org
> Subject: Re: Zone reload time after NOTIFY
> 
> "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.
> 
> I looked at the syslog on one of my BIND 9.2.4 servers, which 
> is slave to many AD zones mastered on a Windows 2003 DNS Server.
> The syslog was a little hard to process, as I have most of my 
> BIND slave servers configured to NOTIFY other slave servers, 
> so I can see in the syslog file:
> 
>      received notify for zone
>      zone ... transferred
>      received notify for zone
> 
> where the last notify appears minutes after the zone transfer 
> has occurred.  This is due to one of the slaves being late in 
> its transfer.
> In the period from May 21 at 03:35 until May 24 at 08:44 I 
> saw 388 zone transfers, and for each the transfer occured 
> within a few seconds of receiving the notify packet.  I am 
> seeing no delays.
> Most of these AD zones are small, and I do not know what 
> percentage of the transfers are done via IXFR.  I do have one 
> forward zone and five reverse zones on the Windows DNS Server 
> (under the control of a MS Windows DHCP server); these zones 
> are somewhat large (the forward zone has 620 entries).
> ----------------------------------------------------------------------
> Barry S. Finkel
> Computing and Information Systems Division
> Argonne National Laboratory          Phone:    +1 (630) 252-7277
> 9700 South Cass Avenue               Facsimile:+1 (630) 252-4601
> Building 222, Room D209              Internet: BSFinkel at anl.gov
> Argonne, IL   60439-4828             IBMMAIL:  I1004994
> 
> 
> 
I am not experiencing a delay in NOTIFY to transfer. I am concerned with
the amount of time its taking before a RR change in a transfer becomes 
available through BIND's name resolution.

Thanks,
Casey