[ntp:questions] R: Re: debugging strange ntp in virtual environment

unruh unruh at invalid.ca
Thu Sep 19 06:08:36 UTC 2013

On 2013-09-19, Riccardo Castellani <ric.castellani at alice.it> wrote:
> I converted physical machine to virtual one, where there is NTPd service.
> My 
> ESX host is running several guest OS included this NTP server.
> Can it be this 
> one the problem ? Virtualization ? I'd like to know if ntpd adjusts only OS 
> time or it adjust hardware clock too.
There is no hardware clock that is used 
except for initial time setup. Time counted by one of the counters--
machine instructions, hpet,...

> In latter case if it adjusted hardwrae 
> clock it shuld modify hardware clock directly on ESX server (where there are 
> running 0 virtual machine)  ?!

>>Harlan Stenn <stenn at ntp.org> wrote:
> - is this some sort of "we've only qualified OS version foo
>>but we need to run 
> on new hardware which does not support OS version
>>foo, so let's use a virtual 
> machine on the new hardware" thing?
>>Has there been more load added to the 
> host on which this virtualNTP server is running?
>>rick jones
> You reference ESX 
> host or guest OS ?
> Guest OS (where ntpd is running) does other jobs
> ESX host 
> has 20 runningl virtual machines.

More information about the questions mailing list