Re: [Ntp] [EXT] NTPv5 -- drop leaps

[Hal Murray <[e-mail]>]

Warner Losh said:
> But UTC-LS is too vague. There are a dozen ways to smear 

I thought all the big players in the smearing world had agreed on a linear 
smear over 24 hours, centered on the leap.  Thus smearing from noon to noon 
bracketing the leap at midnight.

>From https://developers.google.com/time/smear:
   We encourage anyone smearing leap seconds to use a 24-hour linear smear 
from noon to noon UTC.

>From https://aws.amazon.com/blogs/aws/look-before-you-leap-the-coming-leap-seco
nd-and-aws/
AWS does the same.  I can't find a simple sentence.
There is a table about half way down, and a paragraph before it.


But I guess my "all" was optimistic.

Meta/Facebook is/was different.
  https://engineering.fb.com/2022/07/25/production-engineering/its-time-to-leav
e-the-leap-second-in-the-past/
More recently, it has become a common practice to "smear" a leap second by 
simply slowing down or speeding up the clock. There is no universal way to do 
this, but at Meta we smear the leap second throughout 17 hours, starting at 
00:00:00 UTC based on the time zone data (tzdata) package content.

It will be interesting to see what they do if there is another leap.



-- 
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