Ted Lemon <ted.le...@nominum.com> wrote: > > There's an easy way which I think is a clear optimization: > > > When there is a cache miss, before recursing, search the cache for a > > parent NXDOMAIN entry. If you find one, add an NXDOMAIN cache entry for > > the QNAME, and return that, otherwise recurse as usual. > > I don't see a problem with this, but I also don't see any argument for > making a normative requirement to implement it. Do you?
It neatly avoids a lot of wasteful authoritative queries. Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at/ Forties: Northeast 3 or 4. Slight. Fog banks. Moderate or poor, occasionally very poor. _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
