George R. Kasica <[email protected]> wrote:
> On Wed, 31 Dec 2008 21:21:33 +0000, David Woolley
> <[email protected]> wrote:
> 
>>TopCut GmbH / Ludwig ?fele wrote:
>>> Hello everybody!
>>> 
>>> I am using a debian (testing) linux on a virtual machine of VMWare (in a
>>> linux host).
>>> I found, that the time in the VM was awfully wrong and hoped to fix this
>>> with ntp.
>>
>>No.  Assuming VMWare, you fix the host machine with NTP, then use VMWare 
>>tools, with the right options, to control the time on the guest.  Note 
>>that, even then, there will be a large amount of jitter in the software 
>>clock time on the guest, as time is virtualised.
> 
> WE run over 150 VMs under unix/linux where I work and about 20 ESX
> servers (its actually my day job) so I might be able to help you.
> 
> 1) Turn off ntpd on the VM TURN OFF NTPD. You don't want it running.
> But make sure the ntp.conf is valid you will need it.

While I agree, it appears that some VMware documents either encourage or
at least suggest equivalence of using NTP or vmware tools.

<http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&externalId=1006427>
<http://www.vmware.com/pdf/vmware_timekeeping.pdf>

One of the groups I work with will soon be running several linux VM
hosts with ntp enabled based on these documents.  

-- 
Darren

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