[ntp:questions] 10 identical PCs, but different clock drifts.
"terje.mathisen at tmsw.no" at ntp.org
Mon Mar 2 20:17:43 UTC 2009
ryad.bek at gmail.com wrote:
> Hi everybody,
> I've bought 10 PCs with identical hardware (motherboard,...).
> The PCs are located in the same room and running identical
> configurations for 4 days now.
> They are synchronized using garmin 18 GPSes.
> I've just checked the NTP's loopstats file and it seems that all drift
> are different.
> Here are the reported drifts (4th column of loopstats file) :
> As all hardware are the same and brand new, I was wondering if you
> find that normal or if there is a problem with my HW config?
Those numbers are actually very good!
Anything below 100 is a good crystal, and NTP itself was modified a long
time ago to allow up to 500.
It is only the second-order variations that matter, i.e. how
temperature-stable are those drift rates?
- <Terje.Mathisen at tmsw.no>
"almost all programming can be viewed as an exercise in caching"
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