That looks like a server in an room with unstable temperature. Try graphing the server's frequency (ntpq rv or ntpdc loopinfo/kerninfo if enabled on the server), a rising frequency will correlate with a positive offset if that is the case.
On Tue, May 28, 2013 at 7:52 PM, Miguel Barbosa Gonçalves <m...@mbg.pt> wrote: > Hi! > > Lately I've been using the two stratum 2 servers our national observatory > provides to the public mainly as backup for my GPS based local NTP servers. > > I've always found odd that one of them exhibited an erratic behaviour when > compared to the other one. > > I decided to use ntpdate on one of my stratum 1 machines (Trimble > AcutimeGold in position hold mode; looking at my loopstats file my > clock is always > within 5 us of UTC) against these 2 servers every minute for a while and > plotted the results. Offset is in seconds and time is UTC. > > I am on a fibre asymmetrical connection 100 Mbps/25 Mbps. The offsets for > the best behaved server are expected but... the other server? > > After gathering enough data I'll contact them as ask what is the problem > with the server... > > Opinions? > > Regards, > Miguel > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.