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Date:      Thu, 29 Dec 2011 00:52:21 +0700
From:      Victor Sudakov <vas@mpeks.tomsk.su>
To:        freebsd-questions@freebsd.org
Subject:   Re: mutual forwarders in ISC BIND
Message-ID:  <20111228175221.GA27286@admin.sibptus.tomsk.ru>
In-Reply-To: <4EFB1B4F.2090504@my.gd>
References:  <20111228075422.GA18064@admin.sibptus.tomsk.ru> <4EFAE80D.9040900@my.gd> <20111228130734.GA23763@admin.sibptus.tomsk.ru> <4EFB1B4F.2090504@my.gd>

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Damien Fleuriot wrote:
> 
> 
> >>
> >> If you're trying to build up a cache to improve performance and response
> >> time, here's your scenario:
> >>
> >> DNS C, forward to DNS A,B for all queries
> >> DNS D, forward to DNS B,A for all queries
> >>
> >> Your cache will start building up and only responses that are not cached
> >> will be taken from your NS A and B servers.
> > 
> > Sorry, I fail to see how this is any better than two independent DNS
> > servers. Perhaps a variant like
> > 
> > DNS C, forward to DNS A 
> > DNS D, forward to DNS A 
> > 
> > would be close to the goal of cache consolidation.
> > 
> 
> DNS A suffers an outage ; you're fucked, to put it bluntly.

Nope. DNS C and D will do the queries on their own. I don't suggest a
"forward only" setup. I just want the servers to share the cache.

[dd]

> 
> On a side note, have you considered unbound ?
> 
> It may be better suited to your needs and scale.

I would read a comparison of BIND and Unbound with great interest. Do
you perchance have a link?

-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
sip:sudakov@sibptus.tomsk.ru



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