[ntp:questions] Google and leap seconds

Marco Marongiu brontolinux at gmail.com
Wed Sep 21 07:34:58 UTC 2011

Il 21/09/2011 09:26, Marco Marongiu ha scritto:
> Wouldn't it be convenient for ntpd to have
> an option, so that users may refuse to step back the clock in case of a
> leap second, and adjust the clock speed instead?

PS: I'd like to clarify I am not thinking about something like the
tinker directive. Rather, I am thinking about something like the
following (when said option is set):

- upstream signals a leap second insertion/deletion

- after 23:59:59, ntpd consciously does NOT insert the leap second and
suspends step adjustments for a convenient amount of time (T seconds)

- for T seconds, ntpd tries to slow down / speed up the clock to make up
for the leap second

- if, after T seconds, the normal behaviour is restored. If the offset
is still too big, a step change will be forced.

-- bronto

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