[tz] Google public NTP servers to 'smear' leap seconds.

[Tony Finch]

Paul Eggert <eggert at cs.ucla.edu> wrote:

>

> I wonder who first proposed and implemented the 24-hour linear scheme
> that

> Google plans to switch to next time. It's not always that easy
> to change
> Google's collective mind. Was it someone at Akamai? Amazon? Microsoft?


When I did a survey of leap smear schemes in September, only Amazon was
doing -12 to +12 smear. Google originally did a sinusoidal smear, but I
gather that interacted worse with ntpd and large polling intervals than
piecewise linear.


https://www.mail-archive.com/leapsecs@leapsecond.com/msg06152.html



> Come to think of it, we should document leap smearing. Proposed patch
> attached.



It's probably worth noting that ntpd now has an open implementation of
leap smear. Here's a link to the documentation in their Bitkeeper repo:


http://bk1.ntp.org/ntp-stable/README.leapsmear



Tony.

--

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



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mm.icann.org/pipermail/tz/attachments/20161204/eb9c7ba8/attachment.htm>