On Tue, Sep 27, 2016 at 3:28 PM, White, Andrew <andrew.whi...@charter.com> wrote:
> Hi Shumon, > > > > True. When a resolver gets an NXDOMAIN for, say x.example.com, would it > better to say the resolver SHOULD drop from cache all descendents of > x.example.com, or MAY? > > > > It may be computationally expensive to search cache to remove cached > NXDOMAIN responses below x.example.com, and I see no harm in letting > those cached entries expire as their TTL runs out. > It depends on the implementation of the cache. I guess you missed the ~ 100 message thread on this very topic from earlier this year! :-) -- Shumon Huque
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