[ntp:questions] Re: HowTo calibrate system clock frequency using NTP
daniel.kabs at gmx.de
Tue Jan 31 15:56:24 UTC 2006
Hello Professor Mills,
now I have a plan :-) Thank you.
I copied your valuable instructions into the NTP wiki at
I wonder why your procedures do not use "ntpdate". Is it because
"ntpdate" is to be retired soon from your ntp distribution? Or will
"ntpdate" fail to provide data as precise as ntpd? Indeed, I see a
difference when I compare the drift file value against the offset
measured by ntpdate:
A) I had ntp running for one day against a time server. The value in the
drift file converged monotonously to -268.173. This gives a clock error
of -23.17 s/day.
B) I configured ntp in order to serve the pseudo local clock. I
periodically measured the time offset from a time synchronized PC using
"ntpdate". A least-squares fit gives a slope of 23.87 s/day.
Any idea why is this?
Refactor, don't archive! - SamHasler - 28 Aug 2004 - twiki.org
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