[time-nuts] NIST time services
Hal Murray
hmurray at megapathdsl.net
Mon Mar 24 02:50:32 EDT 2014
albertson.chris at gmail.com said:
> The assumption NTP makes is that you can judge the quality of a server by
> the variance (of "jitter") in the time it reports.
I think it's more complicated than that.
I think it also includes the non-jitter part of the round trip time. NTP
assumes the path is symmetric. Any constant asymmetry will turn into an
apparent fixed offset. I think ntpd is smart enough to include that in it's
calculations of the clock quality, but I don't understand the details.
--
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