The first time you start ntpd it looks for ntp.drift file which
contains information
about your clock frequency. If it doesn't find this file it will go
into a measuring
mode for about 15 minutes and then it will adjust the time. Other
thing is that whenever
ntp finds that your clock is set forward it will not just set it to
correct time but it will
sort of 'drag' the clock until it matches the correct time which also
takes a while.

I can run the test tomorrow but can you clarify one thing for me.
Let's say I start two JBT instances
on two computers that have perfectly synchronized clocks. Will both
data files be mostly
identical even though forward-test on the second instance was started
0.5 seconds after the first one?


On Aug 20, 3:39 pm, Eugene Kononov <[email protected]> wrote:
> Oh, now I see the effect. My clock has been synced, it just took a few
> minutes. Please send me your ntp.conf anyway.
>
> On Thu, Aug 20, 2009 at 4:36 PM, Eugene Kononov 
> <[email protected]>wrote:
>
> > ecthx, can I take a look at your ntp.conf file? I simulated the clock drift
> > by setting my PC clock 10 seconds back, and NTP doesn't seem to do anything
> > about it, so I assume I am missing something in the configuration.
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