Re: [Xen-users] how many vcpu's can be allocated by Core in a Xen Host ?

[Freddie Cash <fjwcash@xxxxxxxxx>]

On Tue, Mar 8, 2011 at 9:41 AM, Rogelio Bazan <rogbazan@xxxxxxxxx> wrote:
> if my Xen host has 16 cpus (Cores), how many vcpu's can be assigned to my
> xen guests?

As many as you want.  :)  It all depends on the CPU workload of your VMs.

If you have a workload that uses very little CPU, you can create a
couple hundred VMs each with 1 vcpu.

If you have a workload that uses a lot of CPU, you may be limited to
16 VMs each with 1 vcpu.

If you have a workload that's in the middle, then you can create a
bunch of VMs as needed.

Basically, monitor your CPU usage, and keep creating VMs as you have
resources to support them.  :)

For example, we have an older Xen 3.x box with 2 physical CPUs running
4 VMs with a total of 5 vcpus.  And another 2 CPU box wunning 7 VMs
with a total of 8 vcpus.  And we have a couple of KVM boxes with 4
CPUs running 8-10 VMs each with 1 vcpu.

It all depends on your workload.

-- 
Freddie Cash
fjwcash@xxxxxxxxx

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