Re: sntpclock = ntpdate + 22s

johnea <[email protected]> wrote:
> 22 seconds.

That's the current difference (almost - it's actually 23 now) between
a system clock keeping TAI time (a count of seconds since the
beginning of 1970) and a clock keeping POSIX time (a count of only
non-leap seconds since the beginning of 1970).  A TAI clock increases
smoothly; a POSIX clock jumps back a second when a leap second occurs.
POSIX is more common overall, but clockspeed users tend to use TAI.

Doubts about whether your clock is synchronized usually stem from a
misconfiguration, where you clock is interpreted as TAI by some
programs and as POSIX by other.  To use a TAI clock, you should have
the /etc/leapsecs.dat file installed by clockspeed, and you should use
a right/ time zone (e.g., right/America/Los_Angeles instead of
America/Los_Angeles).  To use a POSIX clock, you should delete
/etc/leapsecs.dat and use a non-right/ time zone.  If you use a POSIX
clock, then when a leap second occurs, you'll have to restart
clockspeed, and either use clockadd to make the one-second jump while
clockspeed isn't running, or let clockspeed bring your clock back into
sync slowly.


paul