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Re: [homenet] Status of draft-tldm-simple-homenet-naming CFA

Juliusz Chroboczek <jch@irif.fr> Fri, 18 August 2017 21:46 UTC

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Date: Fri, 18 Aug 2017 23:46:14 +0200
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From: Juliusz Chroboczek <jch@irif.fr>
To: Ted Lemon <mellon@fugue.com>
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Subject: Re: [homenet] Status of draft-tldm-simple-homenet-naming CFA
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>> If the fast connection's DNS server replies after a delay or not at all,
>> and the slow connection's DNS server replies in a timely manner, using
>> a smart resolver across all the available DNS servers will improve latenc

> Yes, but if your fast connection is lossy, it's not fast. Lossy looks like
> congestion, so TCP slows down.

I never said the fast connection was lossy.  The scenario I'm envisioning
is one in which the DNS server behind the fast link is laggy.

Ted, DNS latency is a significant part of what the web people call "time
to first byte".  DNS resolvers make serious efforts to minimise that
latency by keeping RTT and loss statistics and picking the best resolver.
I don't know if you agree, but I suspect that any protocol that causes web
latency to increase is not going to get deployed easily.

-- Juliusz

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