On 2009-04-14, Clifford Bailey <[email protected]> wrote: > 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?
you could run NTP client on the ESX host, upgrade the guest OS, build a custom kernel with vmt(4), and use vmt's timedelta sensor as ntpd's source. this should help keeping sync, but I don't know how the precision will be.

