Clifford Bailey wrote:
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.
