Date: Tue, 17 Jul 2007 14:17:22 +0100 From: David Malone <dwmalone@maths.tcd.ie> To: Peter Jeremy <peterjeremy@optushome.com.au> Cc: "Heiko Wundram \(Beenic\)" <wundram@beenic.net>, freebsd-stable@freebsd.org Subject: Re: Problems with named default configuration in 6-STABLE Message-ID: <20070717131722.GA59009@walton.maths.tcd.ie> In-Reply-To: <20070717093028.GC1699@turion.vk2pj.dyndns.org> References: <200707162319.41724.lofi@freebsd.org> <200707171005.37507.wundram@beenic.net> <469C835B.6090304@vwsoft.com> <200707171106.30795.wundram@beenic.net> <20070717093028.GC1699@turion.vk2pj.dyndns.org>
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On Tue, Jul 17, 2007 at 07:30:28PM +1000, Peter Jeremy wrote: > Note that it's not just a single AXFR - you need to update your local > slave copy whenever the master copy changes. I'm not sure how often > this is but the current SOA has a 1-day timeout and appears to be about > 24 hours old. I suspect the total data transferred via AXFRs will be > significantly higher than just caching lookup results. I measured the traffic levels a while back: http://www.imconf.net/imc-2004/papers/p15-malone.pdf It's actually pretty close for a moderately busy recursive resolver, and if you allow IXFR (which, I belive, the root servers in question do) then the saving should be bigger. David.
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