Re: [DNSOP] abandoning ANAME and standardizing CNAME at apex

Tony Finch <dot@dotat.at> Mon, 25 June 2018 14:03 UTC

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Date: Mon, 25 Jun 2018 15:02:53 +0100
From: Tony Finch <dot@dotat.at>
To: Ray Bellis <ray@bellis.me.uk>
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Subject: Re: [DNSOP] abandoning ANAME and standardizing CNAME at apex
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Ray Bellis <ray@bellis.me.uk>; wrote:
> On 22/06/2018 19:27, Evan Hunt wrote:
>
> > Minor clarification here: ANAME doesn't require the authoritative
> > server itself to do recursion; it requires it to have access to a
> > reursive server.
>
> Even that though requires that the authoritative server be capable of
> waiting for an asynchronously retrieved value before it can respond.
>
> For some authoritative servers that might require a substantial redesign.

That isn't required if the ANAME target records are fetched/updated by an
out-of-band provisioning process. A server will want to do it this way if
its query rate is bigger than the number of ANAME targetss divided by
their TTLs.

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>;  http://dotat.at/
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