Re: [Tzdist-bis] [calsify] tzdist and IANA

Martin Burnicki <martin.burnicki@burnicki.net> Thu, 18 July 2019 08:29 UTC

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To: Eliot Lear <lear@cisco.com>, Michael Douglass <mikeadouglass@gmail.com>
Cc: Daniel Migault <daniel.migault@ericsson.com>, Paul Eggert <eggert@cs.ucla.edu>, tzdist-bis@ietf.org, IETF-Calsify <calsify@ietf.org>
References: <CADZyTkkNuenOTx77cB8vFzWaSjp_fqtEgaYd00t5e2+Kk6MtRA@mail.gmail.com> <47038bd0-210a-4dbc-173c-15bfa89ac54f@cs.ucla.edu> <6a50708d-5fac-1da9-56b3-ed1cea793752@fastmail.com> <6b1616e3-bfc0-a22a-2aa9-11033c525ff3@cs.ucla.edu> <CADZyTkms=skOgqfoDxTF6TSZBsWbfaCmfPBWCG0E9qb4-qA0Uw@mail.gmail.com> <6e243cf0-a3ff-82a1-3cae-70fbf699f1f7@gmail.com> <98A352CD-3386-49FB-B6C1-D4EC61BB79EC@cisco.com>
From: Martin Burnicki <martin.burnicki@burnicki.net>
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Date: Thu, 18 Jul 2019 10:29:23 +0200
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Archived-At: <https://mailarchive.ietf.org/arch/msg/tzdist-bis/ayZnzAbaXNSpbEtypVGrF4WbM9c>
Subject: Re: [Tzdist-bis] [calsify] tzdist and IANA
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Hi all,

Eliot Lear wrote:
> Hi everyone,
> 
> While the IANA does a great job at servicing our assigned number needs
> and delivering the TZ database to developers, they is not set up, nor do
> they have *any* experience, to handle the load that end clients could
> place on them.  Moreover, they are in no position to support millions of
> people if something goes wrong.  And make no mistake: something will go
> wrong.  I would be okay with a limited tzdist service for those who are
> going to be distributing the data themselves, but the order of receivers
> should be on 100s not millions.

Wouldn't it be nice to have an infrastructure similar to what the NTP
pool provides for time synchronization?

https://www.ntppool.org/en/

There could be one or more primary servers that might have restricted
access, and there could be servers operated by companies, ISPs, or
volunteers that get the information from the primaries and make the
service available to customers or the general public.

Depending on their preferences or policies, users could choose specific
servers provided by the company they work for, or by their ISP.

If none of those is appropriate they could just use the TZDIST pool
where a DNS server provides the IP address of a nearby available TZDIST
server, just like this is done for the NTP pool.

Of course it would be good if the final client could verify that the
provided TZ information is authentic. I'm not sure if this can be
achieved by access via https, or if the TZ/TZDIST data should include a
cryptographic signature.

Martin