[time] NTP in a virtual machine ?
Adrian von Bidder
Sat Nov 25 07:47:19 UTC 2006
On Saturday 25 November 2006 08:08, Parag Mehta wrote:
> Is anyone running a NTP server in a virtual machine and has seen any
> delays or latency ?
In vmware, everything todo with time is completely screwed. Some other
virtualisation solutions might do a bit better, but generally you really
shouldn't mess with time inside a vm, but just take it as a resource
provided from the outside.
ntp assumes a real clock behind the OS-internal time, and corrects for
(slow!) drifts in the area of a few ppm, whereas the sumulated clock inside
a vm will probably be synced anyway, and so will be correct over the long
range, but as the vm executes from the scheduler of the host machine, it
will see more or less random, but quite big, jitter which it isn't prepared
to cope with.
Sterility is inherited. If your parents never had kids, odds are you
-- William R. James in news.admin.net-abuse.email
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