[ntp:questions] Ntp not syncing after powerfail of server
stenn at ntp.org
Fri May 20 03:37:18 UTC 2011
> NTPD needs something like thirty minutes before it is able to serve a
> reasonable facsimile of the correct time. It needs up to ten hours
> after startup to deliver the highest quality time that it is capable of.
Well, that's true for cold-start, with no drift file. But it's not the
normal case, at least for a properly set-up and configured system.
I am used to seeing this reduced to 11 *seconds* if you have a good
drift file and run iburst.
> The corollary to this is that you can't expect NTPD to run 9 AM to 5 PM
> and deliver the best possible quality of time. If you want the best
> possible accuracy, you run NTPD 24x7.
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