On Wed, Feb 27, 2002 at 04:27:32PM +0100, Roelf Schreurs wrote:
> Hi
> we are running ntp as a server on a openbsd 2.9 machine.
> I would like to know (a bit off topic), what a reasonable time is that ntp
> keeps the time in sync.
> Can I expect the time to be synced to 0.01s or less all the time without
> exception?
No, at least not on common hardware :
Offset(1) Drift(2) remarks
pingoo -55.050 12.636 (3) + this is a Sun SS10
diabolo -42.186 53.392 (3)
satanas 45.589 113.931
baccus 49.172 36.068
litdaemon -1.161 11.942 this one is anormally good :)
rosette 55.364 -36.931
stanislas 59.525 -1.407
(1) in ms, as reported by 'ntpq -p'
(2) in ms, as reported by 'cat /etc/ntp.drift'
(3) Synced on an NTP server on the same 100 MBits/s ethernet LAN
Also, don't think that newer boxes will better keep the time
synced. Both 'satanas' and 'diabolo' there are significantly newer
than the other boxes and aren't particulary stronger in that area. The
'litdaemon' box is at least 5 years old and it wasn't an high-end box
at the time we buyed it.
All these boxes have uptimes of at least one month.
--
Rémi
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