[ovirt-users] Understand CPU Socket Cores and VCPU

[Michal Skrivanek]

> On 17 Feb 2016, at 17:36, Taste-Of-IT <kontakt at taste-of-it.de> wrote:
> 
> Hello,
> i have a general Question about Hardware CPU, Socket, Cores and the VCPU, Cores per VSocket and VScoket for virtual Machines. Example i have a single CPU with 4 Cores and 8 Threads. As far as i understand i should configure the virtual machines with that number of socket as the host has. So in this example with max 1 Socket. How is the possibility in VCPUs and VCores? What is the limit in this example? Can i only run max 4 VMs?

in general - as many sockets as the number of cores you have available, minus a couple for the host OS(one or two should be ok)
you can run more, but then they will compete for the core and performance would decrease. But if those VMs are not CPU intensive it may very well be ok (you just need to disable the default cluster policy which limits the size to number of hosts’s cores)

Thanks,
michal

> 
> Thanks for clarifying
> Taste
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