[time-nuts] Tracking NTP displacement and correlation between two clients.

Bob Bownes bownes at gmail.com
Thu Oct 4 13:56:44 EDT 2012


On Thu, Oct 4, 2012 at 1:31 PM, Attila Kinali <attila at kinali.ch> wrote:

> On Thu, 4 Oct 2012 13:04:27 -0400
> Bob Bownes <bownes at gmail.com> wrote:
>
> > The problem stems from one of the two (identical) machines drifting off
> by
> > 60-70 seconds per day. So a few ms here and there are ok.
>
> Is it drifting without ntp or with ntp?
> 1minute drift per day is not unheard of for standard PC RTCs.. i've seen
> even worse..
>
>

With. Hence the issue.

<redacted>

>
> So, if you have any significant time difference (>1ms) between two systems
> that synchronize to the same NTP server in the same LAN, then the
> problem lies somewhere else than the network.
>
>
Exactly where I am at this point. Dozen of other systems in the same
facility don't seem to have this issue.



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