Hello everyone, I see here: https://www.ovirt.org/blog/2017/09/introducing-ovirt-4.2.0/ that version 4.2 will have OVN support. Does anyone know if this will allow VMs to take advantage of 10Gb networking without needing SR-IOV? -- Beau Sapach *System Administrator | Information Technology Services | University of Alberta Libraries* *Phone: 780.492.4181 | Email: Beau.Sapach@ualberta.ca <Beau.Sapach@ualberta.ca>*
Is there an indication that the VMs will not take advantage of 10Gb? On Thu, 7 Dec 2017 15:27:25 -0700 Beau Sapach <bsapach@ualberta.ca> wrote:
Hello everyone,
I see here: https://www.ovirt.org/blog/2017/09/introducing-ovirt-4.2.0/ that version 4.2 will have OVN support. Does anyone know if this will allow VMs to take advantage of 10Gb networking without needing SR-IOV?
Yes, we've done some testing. With an oVirt VM running on a host using 10Gb ethernet copying data to a physical machine also using 10Gb ethernet we don't see network utilization exceed 800Mbits or so. A bit of research online yields some experimentation done by others who used SR-IOV to achieve 10Gb from a VM. I'm not sure where the bottleneck is, possibly in the VirtIO driver. Beau On Mon, Dec 11, 2017 at 1:23 AM, Dominik Holler <dholler@redhat.com> wrote:
Is there an indication that the VMs will not take advantage of 10Gb?
On Thu, 7 Dec 2017 15:27:25 -0700 Beau Sapach <bsapach@ualberta.ca> wrote:
Hello everyone,
I see here: https://www.ovirt.org/blog/2017/09/introducing-ovirt-4.2.0/ that version 4.2 will have OVN support. Does anyone know if this will allow VMs to take advantage of 10Gb networking without needing SR-IOV?
-- Beau Sapach *System Administrator | Information Technology Services | University of Alberta Libraries* *Phone: 780.492.4181 | Email: Beau.Sapach@ualberta.ca <Beau.Sapach@ualberta.ca>*
Thanks for the hint, we are going to check this. You are welcome to share if you have any hints about a possible bottleneck in you scenario. On Mon, 11 Dec 2017 11:21:58 -0700 Beau Sapach <bsapach@ualberta.ca> wrote:
Yes, we've done some testing. With an oVirt VM running on a host using 10Gb ethernet copying data to a physical machine also using 10Gb ethernet we don't see network utilization exceed 800Mbits or so. A bit of research online yields some experimentation done by others who used SR-IOV to achieve 10Gb from a VM.
I'm not sure where the bottleneck is, possibly in the VirtIO driver.
Beau
On Mon, Dec 11, 2017 at 1:23 AM, Dominik Holler <dholler@redhat.com> wrote:
Is there an indication that the VMs will not take advantage of 10Gb?
On Thu, 7 Dec 2017 15:27:25 -0700 Beau Sapach <bsapach@ualberta.ca> wrote:
Hello everyone,
I see here: https://www.ovirt.org/blog/2017/09/introducing-ovirt-4.2.0/ that version 4.2 will have OVN support. Does anyone know if this will allow VMs to take advantage of 10Gb networking without needing SR-IOV?
On Mon, Dec 11, 2017 at 8:21 PM, Beau Sapach <bsapach@ualberta.ca> wrote:
Yes, we've done some testing. With an oVirt VM running on a host using 10Gb ethernet copying data to a physical machine also using 10Gb ethernet we don't see network utilization exceed 800Mbits or so. A bit of research online yields some experimentation done by others who used SR-IOV to achieve 10Gb from a VM.
Are you using multiple TCP streams, jumbo frames, threads, etc.? Y.
I'm not sure where the bottleneck is, possibly in the VirtIO driver.
Beau
On Mon, Dec 11, 2017 at 1:23 AM, Dominik Holler <dholler@redhat.com> wrote:
Is there an indication that the VMs will not take advantage of 10Gb?
On Thu, 7 Dec 2017 15:27:25 -0700 Beau Sapach <bsapach@ualberta.ca> wrote:
Hello everyone,
I see here: https://www.ovirt.org/blog/2017/09/introducing-ovirt-4.2.0/ that version 4.2 will have OVN support. Does anyone know if this will allow VMs to take advantage of 10Gb networking without needing SR-IOV?
-- Beau Sapach *System Administrator | Information Technology Services | University of Alberta Libraries* *Phone: 780.492.4181 <(780)%20492-4181> | Email: Beau.Sapach@ualberta.ca <Beau.Sapach@ualberta.ca>*
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
On Tue, 12 Dec 2017 23:12:12 +0200 Yaniv Kaul <ykaul@redhat.com> wrote:
On Mon, Dec 11, 2017 at 8:21 PM, Beau Sapach <bsapach@ualberta.ca> wrote:
Yes, we've done some testing. With an oVirt VM running on a host using 10Gb ethernet copying data to a physical machine also using 10Gb ethernet we don't see network utilization exceed 800Mbits or so. A bit of research online yields some experimentation done by others who used SR-IOV to achieve 10Gb from a VM.
Are you using multiple TCP streams, jumbo frames, threads, etc.?
Please verify that the expected interface is used. The automatic configuration uses ovirtmgmt to transport the data. This can be changed manually by executing vdsm-tool ovn-config IP_OF_OVN_CENTRAL IP_OF_LOCAL_INTERFACE on the host. Are you using NICs which supports GENEVE offloading?
Y.
I'm not sure where the bottleneck is, possibly in the VirtIO driver.
Beau
On Mon, Dec 11, 2017 at 1:23 AM, Dominik Holler <dholler@redhat.com> wrote:
Is there an indication that the VMs will not take advantage of 10Gb?
On Thu, 7 Dec 2017 15:27:25 -0700 Beau Sapach <bsapach@ualberta.ca> wrote:
Hello everyone,
I see here: https://www.ovirt.org/blog/2017/09/introducing-ovirt-4.2.0/ that version 4.2 will have OVN support. Does anyone know if this will allow VMs to take advantage of 10Gb networking without needing SR-IOV?
-- Beau Sapach *System Administrator | Information Technology Services | University of Alberta Libraries* *Phone: 780.492.4181 <(780)%20492-4181> | Email: Beau.Sapach@ualberta.ca <Beau.Sapach@ualberta.ca>*
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Beau, have you solved your performance problem already? Would you share what is the MTU you have set on the underlying network, and in your VMs? On Dec 13, 2017 17:41, "Dominik Holler" <dholler@redhat.com> wrote: On Tue, 12 Dec 2017 23:12:12 +0200 Yaniv Kaul <ykaul@redhat.com> wrote:
On Mon, Dec 11, 2017 at 8:21 PM, Beau Sapach <bsapach@ualberta.ca> wrote:
Yes, we've done some testing. With an oVirt VM running on a host using 10Gb ethernet copying data to a physical machine also using 10Gb ethernet we don't see network utilization exceed 800Mbits or so. A bit of research online yields some experimentation done by others who used SR-IOV to achieve 10Gb from a VM.
Are you using multiple TCP streams, jumbo frames, threads, etc.?
Please verify that the expected interface is used. The automatic configuration uses ovirtmgmt to transport the data. This can be changed manually by executing vdsm-tool ovn-config IP_OF_OVN_CENTRAL IP_OF_LOCAL_INTERFACE on the host. Are you using NICs which supports GENEVE offloading?
Y.
I'm not sure where the bottleneck is, possibly in the VirtIO driver.
Beau
On Mon, Dec 11, 2017 at 1:23 AM, Dominik Holler <dholler@redhat.com> wrote:
Is there an indication that the VMs will not take advantage of 10Gb?
On Thu, 7 Dec 2017 15:27:25 -0700 Beau Sapach <bsapach@ualberta.ca> wrote:
Hello everyone,
I see here: https://www.ovirt.org/blog/2017/09/introducing-ovirt-4.2.0/ that version 4.2 will have OVN support. Does anyone know if this will allow VMs to take advantage of 10Gb networking without needing SR-IOV?
-- Beau Sapach *System Administrator | Information Technology Services | University of Alberta Libraries* *Phone: 780.492.4181 <(780)%20492-4181> | Email: Beau.Sapach@ualberta.ca <Beau.Sapach@ualberta.ca>*
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
participants (4)
-
Beau Sapach -
Dan Kenigsberg -
Dominik Holler -
Yaniv Kaul