[ntp:questions] NTP with GPS and RTC

Harlan Stenn stenn at ntp.org
Fri Apr 26 19:03:13 UTC 2013

unruh writes:
> Define occasionally. Unfortuneately ntpd requires about 5-10 hours to
> rediscipline a clock to ultimate accuracy when the connection comes up
> again, so if the connection time is shorter than that, chrony (assuming
> you run linux or some unix) is a better choice ( faster lock and
> discipline time). It also allows you to "trim by hand". Ie, if you can
> phone into the device, and find it is say 1 min off, you can tell chrony
> to correct that offset by hand.

And Bill's statement above also depends on your definition of "better".

My understanding is chrony will do an excellent job of tracking the
upstream source it is listening to.  That is not necessarily the same as
maintaining better system time.


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