Date: Mon, 4 Jun 2007 18:18:10 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Chuck Swiger <cswiger@mac.com> Cc: Doug Barton <dougb@FreeBSD.org>, freebsd-current@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: HEADS UP: BIND 9.4.1 imported Message-ID: <20070604221810.GC29472@rot13.obsecurity.org> In-Reply-To: <E67BFAC5-7D3D-4C29-9A22-920C04A643D6@mac.com> References: <46620099.4080007@FreeBSD.org> <20070603022742.GA2886@rot13.obsecurity.org> <E67BFAC5-7D3D-4C29-9A22-920C04A643D6@mac.com>
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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
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