[email protected] writes:
>See these daily NTP offsets:
>Jul 19 20:40:14 t1 ntpdate[16879]: step time server 23.239.26.89 offset
>6.039924 sec
>Jul 20 20:40:14 t1 ntpdate[4698]: step time server 206.55.191.142 offset
>6.038794 sec
6 seconds per day are 70ppm, a cheap crystal oscillator has an error of
about 100ppm and frequency changes with temperature.
When you run ntpd, the file /var/db/ntp.drift is written with a
measurement of this error. I get various values depending
on how much temperature changes and whether a simple crystal
or some temperature compensated oscillator is used.
--
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Michael van Elst
Internet: [email protected]
"A potential Snark may lurk in every tree."
