[ntp:questions] NTP not syncing

Terje Mathisen "terje.mathisen at tmsw.no" at ntp.org
Wed Dec 4 21:25:02 UTC 2013

antonio.marcheselli at gmail.com wrote:
> Hi All,
> I'm posting using google groups, hope this is not causing trouble
> (haven't got my main PC now).
> Something strange is happening. Since I disabled power saving the two
> servers which were not syncing have been ok, always synced and the
> drift file was stable even though a little high on one server (-258
> on one server, -58 on another).
> I kept monitoring the drift file, but it was stable.
> The other day I restarted the service because the log file was not
> being updated anymore.
> Now all three servers are properly syncing as before, and the logs
> are back. But the server which had a drift file of -258 is now
> showing -1 and the one which was showing -58 is now showing -2. The
> third server has not changed its drift file, it's still around 21. I
> restarted the service 3-4 days ago, so the drift file should have
> stabilised by now.
> How is that possible?

It is very common, IF you are running on Linux!

The base frequency is recalculated each time you restart, which means 
that steps of 100-200 ppm from one reboot to the next can be expected.


- <Terje.Mathisen at tmsw.no>
"almost all programming can be viewed as an exercise in caching"

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