[CentOS-virt] ntp on kvm
linuxweb at gmail.com
Tue Jul 21 00:41:24 UTC 2009
We've noticed our fully-virtualized KVM guests' time keeps
getting faster, despite running ntpd.
A quick google reveals this to be a known problem with
virtual guests. It seems there are a variety of solutions,
some apparently vendor-specific.
What is the best practice as of now for KVM guests?
* Setting independent_wallclock=1 (or is that a xen-only thing)?
* Passing kernel parameters? If so, which? The vmware KB
mentions "notsc divider=10" -- is that vmware-specific?
* Just don't run ntpd on virtual guests? And let it get its
time from the host.
The last seems like the easiest/cleanest, if it really does
always get its time from the host.
Thanks for any info.
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