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Re: [dnsoverhttp] [Ext] Caching model

Paul Hoffman <paul.hoffman@icann.org> Mon, 30 October 2017 02:08 UTC

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From: Paul Hoffman <paul.hoffman@icann.org>
To: Martin Thomson <martin.thomson@gmail.com>
CC: "dnsoverhttp@ietf.org" <dnsoverhttp@ietf.org>
Thread-Topic: [Ext] [dnsoverhttp] Caching model
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Date: Mon, 30 Oct 2017 02:08:07 +0000
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Subject: Re: [dnsoverhttp] [Ext] Caching model
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On Oct 29, 2017, at 6:36 PM, Martin Thomson <martin.thomson@gmail.com> wrote:
> See https://github.com/paulehoffman/draft-ietf-doh-dns-over-https/issues/14
> and several others.
> 
> My request is that we agree on what the model is, then we can talk
> about the properties we can extract from that.
> 
> My understanding is that the DNS client would consult its local stack
> and that stack would use HTTP to talk to a DNS API server.  In that
> model, there are at least three caches in play: the local DNS resolver
> cache, the HTTP cache and the DNS API server cache.

I'm having a problem with that list. Where are the first and third caches? (I'm pretty sure I understand the second one...)

--Paul Hoffman

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