[ntp:questions] Re: calculating drift value for ntp.drift?

Drk Ryan ryandrk at hotmail.com
Wed Sep 3 19:35:06 UTC 2003


ryandrk at hotmail.com (Drk Ryan) wrote in message news:<de98eac0.0309011245.2cb3cf86 at posting.google.com>...
> Ulrich Windl <Ulrich.Windl at RZ.Uni-Regensburg.DE> wrote in message news:<m31xv0k7td.fsf at pc5234.rz.uni-regensburg.de>...
> > ryandrk at hotmail.com (Drk Ryan) writes:
> > 
> > > How is the drift value in ntp.drift calculated?
> > 
> > Its PPM (parts per million): Set your clock, let it run freely, then
> > compare with a reference clock. divide the time error by time passed
> > and multiply by one million. Add a sign according to taste. I thinks
> > that's about it.
> > 

Where a clock is being disciplined by ntpd then at the end of the
correction interval the time error shoud be very close (time is a
moving target) to zero. In this case should the value in ntp.drift not
be close to zero also?



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