On 2008-12-09, Hushpuppy <[EMAIL PROTECTED]> wrote:

> I have a machine that is syncing to a Stratum-2 server which is
> syncing to a Stratum-1 server, which has a GPS Stratum-0 device
> attached to it.  At my work (financial services) the market rules
> mandate synchronizing our clocks to within a maximum 3 second
> difference of the NIST atomic clock.  We also need to log/document
> that we are within 3 seconds.

How often do these log entries need to be made?

> So I have been perusing the output of ntpq but I don't fully
> understand it after some time of study.

There are some other tools available besides ntpq.

ntptrace(8) will trace a chain of NTP servers back to the primary
source. e.g.

$ ntptrace
localhost: stratum 4, offset -0.001343, synch distance 0.011004
ntp0.kostecke.net: stratum 3, offset 0.000465, synch distance 0.072698
rover.kostecke.net: stratum 2, offset 0.000405, synch distance 0.009266
bonehed.lcs.mit.edu: stratum 1, offset 0.000007, synch distance 0.000883, \
        refid 'CDMA'

See http://www.eecis.udel.edu/~mills/ntp/html/ntptrace.html

You can use ntpd's logging facilities to collect various statistics. See
http://www.eecis.udel.edu/~mills/ntp/html/monopt.html

-- 
Steve Kostecke <[EMAIL PROTECTED]>
NTP Public Services Project - http://support.ntp.org/

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