[LEAPSECS] stale leap second information
martin.burnicki at meinberg.de
Mon Jan 12 17:12:41 EST 2015
Tom Van Baak wrote:
> Or use this 40-line text file instead:
> The one is nice because it includes a "File expires on 31 December 2015" notice.
This in not an optimal solution, yet, since parsing a string like this
can be error prone. The approach used by the NIST format is better since
it contains the time stamp in a machine readable format and in addition
in a human readable format. Just my 2 cents.
And, applications evaluating the expiration date should emit a warning
quite some time *before* the expiration date becomes current.
For example, the current versions of the files contain the leap second
date at end of June, and the files expire at the end of December, when
(at least in theory) another leap second might be scheduled.
If a warning for the expired file is only emitted at December 28 or 30
then admins don't have much time to care about an update of this file.
If they are warned earlier then they can carefully look at this, and an
updated version of the files should be available roughly 6 months before
the expiration of the previous one.
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