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Re: [v6ops] An Update to Happy Eyeballs

Fred Baker <fredbaker.ietf@gmail.com> Wed, 22 March 2017 15:04 UTC

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From: Fred Baker <fredbaker.ietf@gmail.com>
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Date: Wed, 22 Mar 2017 08:04:17 -0700
Cc: Mark Andrews <marka@isc.org>, IPv6 Operations <v6ops@ietf.org>
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References: <148899860042.20118.391380898590855642.idtracker@ietfa.amsl.com> <A609BABB-BDF2-4CCB-8452-F489C019748C@apple.com> <m1clvfj-0000FCC@stereo.hq.phicoh.net> <ABE752F6-895B-431C-9E94-E0CD2FDDB2E3@apple.com> <m1cmTQX-0000IcC@stereo.hq.phicoh.net> <92EEB875-288D-4CF9-B81F-3B5C8EA49F53@apple.com> <CAKC-DJjeUX1rRB_e99SGJS06RoFZ6E6A8Tpj0hPAvfS6+L+XWA@mail.gmail.com> <BAEBBDCE-790E-43D7-BD2A-AE1BF9B81B34@apple.com> <20170315034622.0EAB566D1CED@rock.dv.isc.org> <CAKD1Yr2fKeJbW=q1wP8+6C-Q=WoVHYR9-HfXZ8-AjZ-_Y8ckyw@mail.gmail.com>
To: Lorenzo Colitti <lorenzo@google.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/iaw1ru05p3_N0xhuziGKd26CYFM>
Subject: Re: [v6ops] An Update to Happy Eyeballs
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> On Mar 22, 2017, at 7:56 AM, Lorenzo Colitti <lorenzo@google.com> wrote:
> 
> I think it's extremely hard to argue that waiting for an A query when you have an AAAA in cache (or vice versa) is going to reduce latency or improve user experience. You can use getaddrinfo if you want, but you're going to pay the price in terms of latency. I wouldn't call that a best practice.

I must be missing something. If you already know the AAAA, fine. If you're using the resolver's cache, what API gets you an IPv6 address other than getaddrinfo?

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