Pivoting

[Gary E. Miller]

Yo Hal!

On Thu, 20 Apr 2017 14:57:53 -0700
Hal Murray <hmurray at megapathdsl.net> wrote:

> We need a web page that summarizes this area - not the internal
> details, but the general problem and how it impacts users.

Actually, EPOCH doesn't impact users, not any differently than __DATE__
did.  EPOCH only impacts repository managers.  And yes, they could use
guidance, packaging guidance is here:

    devel/packaging.txt

Patches welcome.

> NTP overflows in 2036
> 32 bit signed time_t overflows in 2038
> GPS overflows every 1024 weeks (~20 years starting from 1980)
>   First rollover was 22 August 1999
>   They added 3 bits in ???
>   Some older devices used pivot logic to extend their lifetime past
> 2000

None of that changed with EPOCH.  Eric said he is looking into the
pivot problem, he'll tell us when he is ready.

> Maybe mention the distro reproducible problem and __DATE__

That is in devel/packaging.txt and https://reproducible-builds.org/

> Good URLs for more info

I can add that URL to devel/packaging.txt

> I see 4 ways to for ntpd to handle pivoting.

I'll leave that to you and Eric.  Until Eric comes back with a plan, and
seeks input.

In any case, off topic for EPOCH.

> We need to verify that ntpdig does something sane.

Verify away.

> As long as we are cleaning up this area...

So many balls in the air, I'll wait for a few to get caught first.

Feel free to send patches.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588

	    Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin
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