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Re: [DNSOP] New draft for ALIAS/ANAME type

Petr Špaček <petr.spacek@nic.cz> Fri, 07 April 2017 06:44 UTC

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To: Matthew Pounsett <matt@conundrum.com>, Tony Finch <dot@dotat.at>
References: <20170330230806.6273.qmail@ary.lan> <9232F4F4-772F-48AA-80FB-C990662AFD7A@powerdns.com> <alpine.DEB.2.11.1704031253200.13590@grey.csi.cam.ac.uk> <CAAiTEH91_jo2p2kEhtzc=B2KSnqZQ9XLAVsY2TYbh7DTcCcD4Q@mail.gmail.com> <alpine.DEB.2.11.1704041815020.13590@grey.csi.cam.ac.uk> <CAAiTEH8ik1gKkzcJxMWQVMKssQyJUf1aV-Awpuhh2YReadL2vw@mail.gmail.com>
Cc: dnsop <dnsop@ietf.org>, Peter van Dijk <peter.van.dijk@powerdns.com>
From: Petr Špaček <petr.spacek@nic.cz>
Organization: CZ.NIC
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Date: Fri, 07 Apr 2017 08:44:44 +0200
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Subject: Re: [DNSOP] New draft for ALIAS/ANAME type
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On 4.4.2017 19:30, Matthew Pounsett wrote:
> On 4 April 2017 at 13:21, Tony Finch <dot@dotat.at
> <mailto:dot@dotat.at>> wrote:
> 
>     > I believe that's a faulty assumption.   Here's some data:
>     >
>     > [...] During the month of February, [...] an average of 31 changes
>     per zone. [...]
> 
>     That seems to agree with what I meant, though I probably should have
>     said
>     "per-zone" somewhere :-)
> 
> That's the average, but there's a not-insignificant number there being
> updated many times per day.    Most of the time, you're right, there are
> few changes, but one can't assume that any given alias will have a low
> rate of change.

Numbers, that really helps!

If I consider the numbers above and the fact that IXFR is able to deal
even dynamically updated zones, I conclude that pushing ANAME logic to
provisioner side is reasonable approach and that added complexity in
name server itself is not warranted.

-- 
Petr Špaček  @  CZ.NIC

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