[ntp:questions] chrony as a server

William Unruh unruh at invalid.ca
Fri Feb 20 20:22:06 UTC 2015


On 2015-02-19, David Taylor <david-taylor at blueyonder.co.uk.invalid> wrote:
> On 19/02/2015 01:24, Paul wrote:
> []
>> Chrony (in general) pros and cons: <
>> http://chrony.tuxfamily.org/manual.html#Other-time-synchronisation-packages>
> []
>
> ... whwre it says: "Things chronyd can do that ntpd can?t:  chronyd 
> provides support for isolated networks whether the only method of time 
> correction is manual entry (e.g. by the administrator looking at a clock)."
>
> Does not NTP's orphan mode and local clock driver provide this?
>

No. The local clock simply trusts the time (Ie all offsets are defined
to be zero) chrony takes the time as entered by hand by the operator and
uses that to determine the offset. Of course that will not be terribly
accurate ( a second is probably good), but if you are disconnected for a
month, a second is probably pretty good accuracy.




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