Re: [v6ops] An Update to Happy Eyeballs
Philip Homburg <pch-v6ops-7@u-1.phicoh.com> Wed, 22 March 2017 22:22 UTC
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Date: Wed, 22 Mar 2017 23:22:38 +0100
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/AUXrlTXSqvuxCBdNl4_CmEWBBRU>
Subject: Re: [v6ops] An Update to Happy Eyeballs
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>You don't have to use getaddrinfo to do AAAA lookups. You can use your own >code, or even pass binary blobs to res_send if you want. > >getaddrinfo is not very smart. It keeps trying until it has answers for >everything you asked it to do, and then it returns everything. That means >that if the A query is in cache and the AAAA query is not, then you have to >wait for the AAAA query to succeed. > >I think the key point here is that integrating the DNS resolver retry loops >with the connection attempts provide latency savings. What is next? Is this working group going to specify how SMTP clients should do MX lookups? Why is how to do DNS lookups suddenly something v6ops has to write a BCP about? Next question. If an A record happens to be cached and an operator wants to keep traffic out of expensive CGNAT routers. Do we really want to encourage hosts to connect over IPv4 just because an A record was cached and the AAAA record wasn't? Is that really best current practice?
- Re: [v6ops] An Update to Happy Eyeballs Erik Nygren
- [v6ops] An Update to Happy Eyeballs David Schinazi
- Re: [v6ops] An Update to Happy Eyeballs Philip Homburg
- Re: [v6ops] An Update to Happy Eyeballs james woodyatt
- Re: [v6ops] An Update to Happy Eyeballs Nick Chettle
- Re: [v6ops] An Update to Happy Eyeballs Tommy Pauly
- Re: [v6ops] An Update to Happy Eyeballs Philip Homburg
- Re: [v6ops] An Update to Happy Eyeballs Joe Touch
- Re: [v6ops] An Update to Happy Eyeballs Tommy Pauly
- Re: [v6ops] An Update to Happy Eyeballs Philip Homburg
- Re: [v6ops] An Update to Happy Eyeballs David Schinazi
- Re: [v6ops] An Update to Happy Eyeballs Philip Homburg
- Re: [v6ops] An Update to Happy Eyeballs David Schinazi
- Re: [v6ops] An Update to Happy Eyeballs Mark Andrews
- Re: [v6ops] An Update to Happy Eyeballs David Schinazi
- Re: [v6ops] An Update to Happy Eyeballs Mark Andrews
- Re: [v6ops] An Update to Happy Eyeballs 神明達哉
- Re: [v6ops] An Update to Happy Eyeballs Stuart Cheshire
- Re: [v6ops] An Update to Happy Eyeballs Stuart Cheshire
- Re: [v6ops] An Update to Happy Eyeballs Stuart Cheshire
- Re: [v6ops] An Update to Happy Eyeballs Mark Andrews
- Re: [v6ops] An Update to Happy Eyeballs Philip Homburg
- Re: [v6ops] An Update to Happy Eyeballs 神明達哉
- Re: [v6ops] An Update to Happy Eyeballs Stuart Cheshire
- Re: [v6ops] An Update to Happy Eyeballs Benno Overeinder
- Re: [v6ops] An Update to Happy Eyeballs Lorenzo Colitti
- Re: [v6ops] An Update to Happy Eyeballs Fred Baker
- Re: [v6ops] An Update to Happy Eyeballs Lorenzo Colitti
- Re: [v6ops] An Update to Happy Eyeballs Job Snijders
- Re: [v6ops] An Update to Happy Eyeballs Mikael Abrahamsson
- Re: [v6ops] An Update to Happy Eyeballs Brian E Carpenter
- Re: [v6ops] An Update to Happy Eyeballs Philip Homburg
- Re: [v6ops] An Update to Happy Eyeballs Gert Doering