On Mon, Apr 11, 2016 at 09:13:42PM +0000, Adrien de Croy wrote: > If we simply added a new QTYPE which permitted a server to respond with > all matching A and AAAA records then that would solve a lot of problems.
As far as I've seen, all of these suggestions share the same problem: No matter how the multiple-QTYPE query is implemented, EDNS option or meta-type or whatever, you can't know in advance whether an authoritative server will support it, and you won't want to waste a whole RTT waiting to find out, so you're going to send simultaneous A and AAAA queries *anyway*. So, unless I'm missing something (certainly more than possible), I don't see server workloads or client latency being significantly reduced by the deployment of a mechanism like this. I agree it's a sensible idea to combine queries when possible, and I wish a meta-type of the sort you describe had been included when the DNS was designed originally. But at this point, if we want to change the way lookups work, the early adopters need to see a real benefit. At this point, I mostly only see costs. -- Evan Hunt -- e...@isc.org Internet Systems Consortium, Inc. _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
