[ntp:questions] Why does ntp keep changing my conf file?

David J Taylor david-taylor at blueyonder.co.uk.invalid
Sat Sep 18 18:46:38 UTC 2010

"David Woolley" <david at ex.djwhome.demon.invalid> wrote in message 
news:i72tr6$4so$1 at news.eternal-september.org...
> I think you miss the point.

Quite possibly, it des get a bit esoteric at times!

> ntpd does better because the disciplined clock time is about an order of 
> magnitude more accurate than the spread of offsets, whereas the ntpdate 
> time jumps around with the same order of magnitude as the offsets. 
> There is no way of measuring the true ntpd time keeping error using just 
> ntpd, because any part of it that could be measured should be being 
> removed by the time discipline daemon.
> Your graphs are not graphs of the ntpd disciplined clock errors, but 
> rather they are graphs of the sample errors.

So, if I understand you correctly, you are saying that because ntp 
measures and reports an offset, it will try and correct the clock in the 
opposite direction, so that the actual clock error is likely to be less?

I can't get at any better value, so the plots are currently the best I can 
do.  I label them as "offset" since that's the field they come from.

I have no interest in using ntpdate, as I understand it to be a less 
accurate approach.


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