Ahhh okay. So maybe I'm expecting too much perfection of the monitoring server and it's plotting of offset data.
-Alby On Wed, Sep 25, 2013 at 1:17 PM, Rob Janssen <[email protected]> wrote: > AlbyVA wrote: > >> >> "...A couple of times an hour the pool system checks the time from your >> server and compares it to the local time..." >> >> I was wondering, where is "local time" being obtained? Is it an average >> of all the other servers in a Country? All I see is a monitoring station >> being in Los Angeles. >> >> Thanks, >> -Alby >> > It probably is the local time on the monitoring server. > Not "local time" in the sense of the local wall clock time, but UTC time > locally on the server. > All of the ntp server works in UTC time, local time is not a concept known > to ntp. > Conversion of UTC to local time is done by the operating sytem and/or > library routines. > > Anyway, there is an error in this monitoring. The monitored time always > has a negative offset. > I have never seen anything different, no matter how correctly tuned my > time server. > (it should now be within .1 ms most of the time, but the monitoring plot > cloud is always > between -10 and -3 ms) > I would say there is a systematic error of about 4 or 5 ms. > > Rob > ______________________________**_________________ > pool mailing list > [email protected] > http://lists.ntp.org/listinfo/**pool <http://lists.ntp.org/listinfo/pool> >
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