[ntp:questions] Single best NTP status indicator of clock accuracy?

David Woolley david at ex.djwhome.demon.invalid
Fri Jul 16 20:05:33 UTC 2010

This thread has been dormant for more than 7 months!

Ulrich Windl wrote:
> kjans <kert.jans at gmail.com> writes:
>>   There seems to be several possibilities:
>>     - delay or offset or jitter (from ntpq -clpeers)

Does not include systematic error.

>>     - sync distance (from ntptrace)

Extremely pessimistic.

>>     - maximum error (from ntpdc)

Also pessimistic.

> estimated error, maybe.

I don't think that includes systematic error due to asymmetry.  It's 
basically impossible to get a reasonable estimate of that component 
without detailed knowledge of the environment.

>>     - precision (from ntpq -crl)

Characteristic of the hardware/OS and EXTREMELY optimistic as estimate 
of error.
> That's a constant.

And that as well.

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