[CentOS] Virtualization option at firstinstall CentOS-5.4 x86_64
neil at JAMMConsulting.com
Tue Nov 17 03:20:37 UTC 2009
> In the Red Hat 5 Virtualization documentation it seems to strongly
> recommends having at least one physical cpu per VM. Since I
> have a quad
> core and I want to run the host plus 2-3 VMs, I decided give
> each VM one
> virtual cpu. Maybe I was too cautious.
In section 28.4 of the RHEL 5.4 Virtualization Guide,
Virtualized CPUs are overcommitted best when each virtualized
guest only has a single VCPU. The Linux scheduler is very efficient
with this type of load. KVM should safely support guests with
loads under 100% at a ratio of 5 VCPUs Overcommitting single
VCPU virtualized guests is not an issue.
So, if you are going to overcommit CPUs, make sure each
one of the guests has a single VCPU. If you want to
allocate multiple VCPUs to the guests, do not overcommit
I hope this helps,
Neil Aggarwal, (281)846-8957, http://UnmeteredVPS.net
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