The whole phenomenon is what I would call “context-sensitive resolution”
(although we don’t like neologisms, so I’m not proposing that).
Context-sensitive resolution encompasses “split DNS”, “views”, policy-based
resolution (blacklists, etc.), GSLB algorithms, geolocation, even plain old
round-robin. The abstract, overarching concept is for the resolver to make a
decision on how to answer a particular query, based on one or more attributes
of the query transaction, including the “existential” attribute of what
resolver was asked the question in the first place (aka “splitting”).
- Kevin
From: DNSOP [mailto:dnsop-boun...@ietf.org] On Behalf Of Ted Lemon
Sent: Tuesday, March 20, 2018 5:05 AM
To: Paul Wouters <p...@nohats.ca>
Cc: dnsop WG <dnsop@ietf.org>
Subject: Re: [DNSOP] Terminology question: split DNS
Yes, split horizon is the original term, which has experienced linguistic drift
and is now just split DNS.
I think there is a useful distinction to be made between the various different
ways that global names may have different meanings in different contexts.
RFC 2826 talks about this a bit, and RFC 8244 comments further in section
4.1.1. Neither document attempts to enumerate the use cases, however.
I think that split DNS is a specific use case, and does not encompass the whole
phenomenon. If we want to talk about the whole phenomenon, this may not be the
place to do it—I don't actually know of a term for the general idea.. But I'm
pretty sure that "split DNS" is not that term.
On Mar 19, 2018 21:15, "Paul Wouters" <p...@nohats.ca<mailto:p...@nohats.ca>>
wrote:
On Mon, 19 Mar 2018, John Heidemann wrote:
+1 on "split-horizon dns" as the term, over "split dns" and some other
neologism, on the basis of running code and existing documentation and
existing wide use.
I and google disagree:
"split dns": 72900 hits
"split horizon dns": 5640 hits
If the document is about explaining terminology, it must explain "split
dns" and can say another term for it is "split horizon dns", but not the
other way around.
I personally don't hear (or use) "split horizon dns"
Paul
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