On Fri, 2011-07-15 at 12:53 -0400, Anton Aylward wrote:
Per Jessen said the following on 07/15/2011 12:05 PM:
If properly configured ntp will _always_ have a server - the local clock. The drift of the local clock oscillator will have been determined, so ntp will use that to keep massaging the clock until a better source becomes available.
+1
And that is what chrony provides. A useful estimate of time before the first server is found.
I don't know anything about chrony, so I have to wonder what information it has that ntp does not?
Indeed. At startup, in the absence of an outside reference (or until an outside reference can be obtained -- however long that takes) there is the hardware clock, which may drift. NTP 'learns' the drift rate of the clock, and keeps 'learning'.
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