[ntp:questions] Apple Mac mini instabiliy
mayer at ntp.isc.org
Sat Jan 27 23:26:55 UTC 2007
Dmitry Ivanov wrote:
> I am migrating from Linux workstation to Mac mini (Intel 1.66 GHz). I
> like most of this computer and this OS. The only thing is really
> wrong: ntpd performance.
> Our three local NTP servers are stratum-2 and their offset usually
> does not exceed 2-3 ms.
> First, I have tried "official" way of using NTP on Mac OS X. This
> resulted in ~600 ms offset after 24h of operation.
It would help if you showed the state of things using "ntpq -p -c rv" so
we could get an idea what's going on.
> OK, I have created my own ntp.conf and restarted "Network Time"
> service. My old Linux box has the same configuration with three local
What's "Network Time"
> After several hour of operation, Mac mini still has 64 sec. polling
> interval. At the same time Linux box has reached 1024 sec. Frequency
> displayed by "ntpq -c rv" is drifting between 6 and 8 all the time...
You shouldn't see a poll interval of 64 secs after that long so some is
definitely wrong but we can't tell without some data from the billboard.
> What is wrong with Mac mini clock? Do other Macs have the same
It must be some kind of configuration issue. What version of ntpd are
you running? Also are your firewall's set up correctly? is 123/UDP open
to send and receive packets?
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