On Tue, Jul 14, 2015 at 1:00 PM, 神明達哉 <jin...@wide.ad.jp> wrote:
> At Mon, 13 Jul 2015 22:01:29 -0400, > Shumon Huque <shu...@gmail.com> wrote: > > > Regarding Section 5 (possible side effect on root servers), I wonder > > > about the implication of qname-minimization (which I expect will be > > > deployed much sooner than this proposal). A resolver that supports > > > qname-minimization would first send a query to "local." to the root > > > server upon receiving a "foo.local" query, and cache the result of > > > NXDOMAIN for "local.". It will suppress subsequent external queries > > > for any subdomain of it. > > > > Yes, this will certainly be a very beneficial result of qname > minimization. > > And the same remark should apply here, too. We'd need "Stopping > Downward Cache Search on NXDOMAIN" in addition to qname minimization > for this to work. > I think we can distinguish the negative caching algorithm and the iterative resolution algorithm. The current iterative resolution algorithm already interprets NXDOMAIN literally (unlike negative caching), so I don't think we need to explicitly say this for the qname minimization variant of iterative resolution either. However, I suppose there's no harm in adding explicit text around this point. Shumon Huque
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