BIND 8.2.2-P7 and NOTIFY flood

[Alexander Ottl]

Kenneth Karoliussen wrote:
> 
> >Yes.  There is no way for a nameserver to know if a zone was edited
> >when the server was down.  The server sends the notifies in case
> >the zone was modified.
> 
> Although it should not be mandatory, or there should rather have been a way
> to set this behaviour in the configuration. If there was a way to disable this
> initial notify from master, the slave server(s) should still check its revision
> when the SOA Refresh expire. Overall I think such new feature for notify
> would be helpful for optimising the performance on initial run of Named..
> 
> Best,
> 
> Kenneth Karoliussen

Really, how often do you restart your named? NOTIFY gives you a
guarantee that your name servers are synchronized. If you could disable
NOTIFY on startup you would break that guarantee -- though only for the
refresh time. 

If you are NOTIFYing servers that don't care something is wrong with
your setup. If you are restarting named so often that this NOTIFY is a
problem then something unrelated to NOTIFY should probably be fixed.

Just an hour ago I restarted named for the upgrade to 8.2.2P7 and I did
it a bit reluctantly. Like with any server one doesn't want even the
slightest down time so one doesn't want to restart unless absolutely
necessary.

Regards,
Alex

> ----- Original Message -----
> From: <Mark.Andrews at nominum.com>
> To: "Kenneth Karoliussen" <nc at collector.org>
> Cc: <comp-protocols-dns-bind at moderators.isc.org>
> Sent: Thursday, November 16, 2000 11:21 PM
> Subject: Re: BIND 8.2.2-P7 and NOTIFY flood
> 
> > Is there a way to prevent master to send NOTIFY to its slaves on start-up?
> > I have noticed that master server always send a notify for all zones it has i
> > n its configuration
> > when named is initiated..
> >
> > I have reviewed the current configuration options for 8.2.x, but can't find a
> > ny way to disable
> > this. You may set "notify no", but this totally disable the notify feature, a
> > nd you usually don't
> > want to do this. The reason for wanting to disable this initial notify, is th
> > at the notify transactions
> > between master and the slave(s) are somewhat time and CPU consuming when havi
> > ng a large
> > amount of zones allocated.
> >
> > Are there actually any obvious reason for the master server to send notifies
> > for absolutely *all*
> > zones on start-up?
> 
> Yes.  There is no way for a nameserver to know if a zone was edited
> when the server was down.  The server sends the notifies in case
> the zone was modified.
> 
> Mark
> >
> > Best,
> >
> > Kenneth Karoliussen
> >
> >
> >
> >
> --
> Mark Andrews, Nominum Inc.
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com

-- 
Alexander Ottl
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