On Tue, Mar 15, 2016 at 10:36 AM, Ted Lemon <ted.le...@nominum.com> wrote:
> > It neatly avoids a lot of wasteful authoritative queries. > > This is an interesting statement. Do you have any numbers on this, or is > this based on intuition? > > In order to measure this, you would need to measure it on a fairly active > cache, not on the authoritative server. > > I haven't seen any measurement studies. But at a recent DNS-OARC meeting, Bert Hubert mentioned that PowerDNS were driven to implement this based on a real operational problem: too many NXDOMAIN eliciting queries from one of their large resolvers to the F.ROOT server resulting in them being response rate limited. -- Shumon Huque
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