[ntp:questions] Extracting ntpq like information programmatically
david at ex.djwhome.demon.invalid
Tue Apr 2 07:49:00 UTC 2013
> needs to remember only the last couple of measurements. It is a Markovian
Which is s statistics term. The biggest difference between chrony and
ntpd, is that chrony seems to have been designed using statistics
algorithms (linear filters), and ntpd using engineering ones (digital
filters and PI controllers). There is a culture clash at work here.
ntpd is definitely an infinite impulse response system. I think chrony
is a finite impulse response one. FIR ones will fully accommodate a real
change in a finite time, but will also do so for a persistent error.
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