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Date: Mon, 4 Jun 2007 18:18:10 -0400
From: Kris Kennaway <kris@obsecurity.org>
To: Chuck Swiger <cswiger@mac.com>
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Cc: Doug Barton <dougb@FreeBSD.org>, freebsd-current@freebsd.org,
	Kris Kennaway <kris@obsecurity.org>
Subject: Re: HEADS UP: BIND 9.4.1 imported
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On Mon, Jun 04, 2007 at 01:21:51PM -0700, Chuck Swiger wrote:
> On Jun 2, 2007, at 7:27 PM, Kris Kennaway wrote:
> >>For the vast majority of users, this should be a noop. Please test,
> >>especially if you have a heavier loaded name server, and report any
> >>issues.
> >
> >Also I'll remark that we remain very interested in getting access to
> >either a busy nameserver or the data stream from one, in order to
> >profile FreeBSD kernel activity and look for places to optimize
> >performance.
> 
> I've mentioned this before, but the dns/adns port provides some handy  
> utilities for putting a DNS server under high loads.
> 
> Something like the following command will generate anywhere from 200  
> queries/sec to 1500+ queries/sec, depending on the IPs involved in  
> the logfile you use, and how rapidly the remote nameservers respond:
> 
>   /usr/local/bin/adnslogres -c 500 < /var/log/httpd-access.log >! / 
> var/log/httpd-access.log.dns

Thanks, this is a good idea.  I hadn't though of using a httpd access
log as a source of queries.

Kris