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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