HI Yaniv I looked at your reference and it looks like I have almost the same thing, but I was looking to take it a step further with virtual numa node. Is it necessary to really do it for extra performance? Below is my code snippet, it is not cleaned up yet, but works. I am also looking at programatically added host devices such as a GPU. Do you have an example of doing that? # Get the "vms" service vms_service = connection.system_service().vms_service() # Create vm vms_service.add( types.Vm( name='test', type=types.VmType('high_performance'), memory=20 * 2**30, memory_policy=types.MemoryPolicy(guaranteed=20 * 2**30, ballooning=False, max=20 * 2**30), os=types.OperatingSystem(boot=types.Boot(devices=[types.BootDevice.NETWORK, types.BootDevice.HD]), type='LINUX'), #time_zone=types.TimeZone('GMT-06:00'), numa_tune_mode=types.NumaTuneMode('preferred'), io=types.Io(threads=1), cpu=types.Cpu(topology=types.CpuTopology(cores=1, sockets=4, threads=1), mode=types.CpuMode('host_passthrough'), cpu_tune=types.CpuTune(vcpu_pins=[types.VcpuPin('24', 0), types.VcpuPin('25', 1), types.VcpuPin('26', 2), types.VcpuPin('27', 3)])), placement_policy=types.VmPlacementPolicy(affinity=types.VmAffinity('pinned'), hosts=[types.Host(name='lab5')]), custom_properties=[types.CustomProperty('hugepages', 'hugepages', '1048576')], cluster=types.Cluster( name='lab5-Local', ), template=types.Template( name='Blank', ), ), ) Thanks Don On Fri, Jan 26, 2018 at 11:04 AM, Yaniv Kaul <ykaul(a)redhat.com&gt; wrote: