root and in-addr.arpa zone transfers

[Michael Monnerie]

On Montag 14 September 2009 Stephane Bortzmeyer wrote:
> > Faster queries after a named restart. Reverse lookups faster too,
> > good for the spam filters.
>
> Did you measure it or is it, like most claims "X is faster", just a
> guess?

In normal Setup, we see lots of querie to the 3rd DNS entry in 
resolv.conf for quite some time after a restart.
With root/arpa copies local, even after a restart very quick 
normalisation occurs.

I wouldn't recommend doing the slaving if you have to start new, but we 
already have the infrastructure/scripts running and tested, so I'll just 
keep it. We had no negative side effects so far. While it's a small 
gain, keeping it doesn't hurt, so: I won't touch the running system.

mfg zmi
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