Mailinglist Archive: opensuse (1002 mails)

[Roger Oberholtzer <roger@xxxxxx>]

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'.

During the current run. Not so sure about between runs. 


-- 
Roger Oberholtzer

OPQ Systems / Ramböll RST

Ramböll Sverige AB
Krukmakargatan 21
P.O. Box 17009
SE-104 62 Stockholm, Sweden

Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696

SHAW'S PRINCIPAL
    Build a system that even a fool can use,
    and only a fool will want to use it.

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