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Hi Adhi,

Do you mean that you can’t run two VMs each with 8 vCPUs, or do you mean that you are trying to run one VM with more than 8 vCPUs?

I believe that the cpu_allocation_ratio means that you can re-use each physical cpu (thread) up to 16 times with different VMs, but each VM is still restricted to at must the number of physical cpu threads you have on the machine.

Bob
From: Adhi Priharmanto [mailto:adhi.pri at gmail.com]
Sent: 29 November 2017 11:38
To: openstack <openstack at lists.openstack.org>
Subject: [Openstack] [xenserver][ocata] overcommit vcpu

Hi,

I've been running ocata release with xenserver as hypervisor, my question, how to overcommit vCPU of xenserver ?

my xenserver have 4 physical core and 8 vcpu. I already add "cpu_allocation_ratio = 16.0" option into my nova.conf at compute nodes, but its still read 8 vCPUs by scheduler.


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Cheers,


Adhi Priharmanto
about.me/a_dhi






+62-812-82121584

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