Some domains don't resolve.
mayer at gis.net
Mon Jun 9 03:54:28 UTC 2008
Barry Margolin wrote:
> In article <g2dhd2$1mb8$1 at sf1.isc.org>,
> Sten Carlsen <ccc2716 at vip.cybercity.dk> wrote:
>> The question as I read it, is if a very small amount of users will
>> benefit most from using the cached lookups of a large number of users
>> (the whole ISP population) or from having their own independent resolver.
>> I have that situation here, I first used forward but later switched to
>> just resolving. My feeling (I have no statistics) is clearly in favour
>> of NOT forwarding. I don't see any speed penalty in real life but got
>> rid of some mysterious issues that happened while forwarding and the
>> speed seems to be higher.
> I'm not saying that I recommend forwarding. I don't, because it adds an
> extra layer of dependency, and the benefit is probably not worth it.
> I was just refuting the guy who said that the theory that you get better
> cache hits is a myth.
That is the problem. It's just a theory. The theory correctly says that.
The problem is that theories are not what happens in practice and you
rarely really benefit from it.
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