[ntp:questions] Question on how to Slew time in NTP (David Woolley)

David J Taylor david-taylor at blueyonder.co.uk.invalid
Fri Dec 16 06:55:25 UTC 2011


"Richard B. Gilbert" <rgilbert88 at comcast.net> wrote in message 
news:C5-dneE6pqwDtnfTnZ2dnUVZ_o2dnZ2d at giganews.com...
[]
> Is this something relatively new?  ISTR that it still took about thirty 
> minutes to get a reasonable facsimile of the correct time even when 
> restarting with a good drift file.
>
> I wish I could draw a graph here.  Since I can't, I'll try to describe 
> it.  Start with an error of twenty or thirty seconds, mad dash to 
> correct the error, followed by overshoot, and ringing.  Ringing decays 
> slowly. If I were at the controls, I'd be tapping the brakes as we 
> approach zero error!

I would try a recent NTP with configuration parameters appropriate to the 
environment you're using, with a valid drift file.  A 20s error should be 
corrected by a step, followed by fine adjustments.  I'm not talking 
microsecond offsets, though.

Cheers,
David 



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