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Re: [DNSOP] Terminology: "primary master"

Tony Finch <dot@dotat.at> Mon, 27 November 2017 13:22 UTC

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Date: Mon, 27 Nov 2017 13:22:51 +0000
From: Tony Finch <dot@dotat.at>
To: Joe Abley <jabley@hopcount.ca>
cc: "dnsop@ietf.org" <dnsop@ietf.org>, Havard Eidnes <he@uninett.no>
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Subject: Re: [DNSOP] Terminology: "primary master"
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Joe Abley <jabley@hopcount.ca> wrote:
> On Nov 23, 2017, at 12:44, Tony Finch <dot@dotat.at> wrote:
>
> > It's quite difficult to have multiple masters and DNSSEC and coherent
> > copies of the zone from all masters - i.e. more effort than just spinning
> > up parallel instances of BIND or Knot in automatic signing mode.
>
> Note that I wasn't talking about multiple signers; I was talking about
> (from the perspective of one particular slave) having multiple masters
> available to serve precisely the same zone.

A primary master is wrt a zone not a server - a zone's primary master is
a server that's authoritative for a zone and which does not get the zone
contents via axfr/ixfr, but instead from a master file and/or UPDATE (or
a non-standard mechanism such as directly from a database).

The term says nothing about the downstream xfer topology. You can very
well having a primary master (plus backup(s)) feeding a cluster of
distribution servers which in turn feed the public authoritative servers.
The xfer topology doesn't have to be a tree, it doesn't even have to be an
acyclic graph.

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/  -  I xn--zr8h punycode
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