Per Jessen wrote:

> Carlos E. R. wrote:
> 
>> On 2016-09-02 16:00, Per Jessen wrote:
>>> Continued from opensuse-factory:
>> 
>> (by the way, this was
>> https://bugzilla.novell.com/show_bug.cgi?id=773323)
> 
> I didn't know that one, but it seems to be about local vs UTC time?
> 
>>>> But if you run the ntp daemon on guests, it tries to adjust the
>>>> speed of the clock there. That's how it works.
>>> 
>>> Of course, that's what you want it to do.  You want the guest clock
>>> synchronized.  It would appear to be a good idea to have ntp on the
>>> xen Dom0 govern the clock for all the guests, but in my experience
>>> systemd does not like that.
>> 
>> Yes, we want the clock synchronized, but not by adjusting the speed
>> on guests. Just copied from the host. It adds load on the virtualized
>> hardware.
> 
> Yes, the obvious way seems to be to just leave the guests to trust the
> synchronized clock from the Dom0.  The load is negligible, especially
> on a typical virtual host.

I don't know if anybody cares much, but on a xen guest running 
Leap422b1 with ntp disabled, I no longer see those "Time has been
changed" messages apart from once or twice.  (I used to have them twice
a minute).  I'll leave it running for a while and see what happens. 

Does anyone here have an opinion on the matter?


-- 
Per Jessen, Zürich (21.1°C)
http://www.hostsuisse.com/ - dedicated server rental in Switzerland.

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