[ntp:questions] NTP offset doesn't change.
Harlan Stenn
stenn at ntp.org
Wed Feb 11 09:53:03 UTC 2015
William Unruh writes:
> On 2015-02-11, Harlan Stenn <stenn at ntp.org> wrote:
> > It's one thing if a system rarely steps. It's a bit different if those
> > steps happen more frequently.
>
> Yes. And it is either equally rare that the system will go over 500PPM,
> but sometimes a computer can have a large "natural" drift, (even over
> 500PPM) and that will drastically reduce the "headroom" to deal with
> unusual situations. (ie, if the computers normal drift is 400PPM, that
> means that the effective cap is only 100PPM, not 500).
> stepping is much worse than high PPM since it is infinite PPM.
Where would you get the idea that a 400ppm swing would be "normal"?
Or even 200PPM?
> Note that were ntpd designed for 5000 PPM then anything else could
> follow it since it could also do 5000 PPM.
Sure, and if it was designed for 10S/S it would handle 10S/S swings. But
none of this has been shown to be normal or useful.
> Yes, we are talking about choices. And all I was saying was that this
> particular choice was somewhat arbitrary.
That depends on your definition of "somewhat".
More or less, "everything tastes like chicken". More or less...
H
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