[ntp:questions] Not-So-Newbie question
Peter Laws
plaws at ou.edu
Fri Feb 22 21:24:32 UTC 2008
OK, so I first set up NTP about 11 years ago. Pointed the (NIS/NFS!)
server at a Stratum 1 clock and then multicast time out to anyone who
wanted it (I set up all the workstations to listen to multicast - I think
that was the default if you enabled NTP in Solaris).
I've since been playing with it in ever more complicated scenarios and now
have two Stratum 1 clocks (and probably a 3rd soon) and several Stratum 2s
for user access.
Yesterday, I added another Stratum 2 to the group and for some reason, it
seems to be taking a long time to get stabilized. Part of the problem, I
think, is that it's running off a Knoppix CD (it's an NPAD test system). I
worked around the fact that the drift file, by default, had 0.00 in it, but
I don't think that's an issue since I've restarted the daemon a number of
times tweaking things. Other systems of the same HW type didn't take this
long.
My real question is this: What am I really looking at in the offset and
jitter columns? What makes a "good server" in terms of ntpq -p output?
Low offset? Low jitter? Some combination?
--
Peter Laws / N5UWY
National Weather Center / Network Operations Center
University of Oklahoma Information Technology
plaws at ou.edu
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