Clifford Bailey wrote:
quoted text
> Hi,
> 
> I'm trying to run a couple of ntp servers using openntpd on openbsd
> 4.2 running as a vm on a vmware esx server. My problem is that the
> machines never seem to become completely stable. They become
> syncronised, but in 24 hours they may lose syncronisation 2 or 3
> times.
> 
> I was wondering whether anyone on the list has been successful running
> an ntp server in this way, or is this a known issue with ntp on
> virtualised platforms? Is there anyway of tweaking the install to make
> it more reliable?

Guests are very sensitive to stuff like the VMware host using CPU 
frequency scaling due to load, since it will make all guests run at 
different speeds when it changes, so the general hint is not even run 
ntp to synch the guest clocks, but rather use VMWare tools to do it, and 
sync the hosts using ntp.

Given that, running ntp servers on guests is even less likely to be a 
good idea.