Mike K Smith <[EMAIL PROTECTED]> writes: >On 12 Sep, 22:14, David Woolley <[EMAIL PROTECTED]> >wrote: >> Howard Barina wrote: >> >> > Does an NTP servers take into account it's estimated offset in serving = >time >> >> There seem to have been a lot of questions asked in the last month that >> are based on the false assumption that "offset" measures the difference >> between the local clock and true time. =A0Has someone published a >> misleading document, somewhere? >I think I am one of the people who has made this mistake.
>> "offset" is the difference between the clients best estimate of the true >> time and a weighted average of the most recent "best" measurements from >> its upstream servers. =A0Those measurements have a significant measuremen= >t >> error. >So I can't plot the offsets in the loopstats file to show how accurate >the time was on an NTP client over a period of time? That is the best estimate that you have. Alternatively buy a GPS hook it up and measure the offset against that. >How can I obtain a historic record of the difference between true time >and local clock time on an NTP client? You need a source for "true time". A gps receiver will give you one with an accuracy of something like microseconds. >Thanks >Mike _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
