Re: [ovirt-users] 10Gb Networking with OVN

2018-01-11 Thread Dan Kenigsberg
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"  wrote:

On Tue, 12 Dec 2017 23:12:12 +0200
Yaniv Kaul  wrote:

> On Mon, Dec 11, 2017 at 8:21 PM, Beau Sapach 
> 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 
> > 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  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.sap...@ualberta.ca *
> >
> >
> > ___
> > Users mailing list
> > Users@ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
> >
> >

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Re: [ovirt-users] 10Gb Networking with OVN

2017-12-13 Thread Dominik Holler
On Tue, 12 Dec 2017 23:12:12 +0200
Yaniv Kaul  wrote:

> On Mon, Dec 11, 2017 at 8:21 PM, Beau Sapach 
> 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 
> > 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  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.sap...@ualberta.ca *
> >
> >
> > ___
> > Users mailing list
> > Users@ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
> >
> >  

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Re: [ovirt-users] 10Gb Networking with OVN

2017-12-12 Thread Yaniv Kaul
On Mon, Dec 11, 2017 at 8:21 PM, Beau Sapach  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 
> 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  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.sap...@ualberta.ca
> *
>
>
> ___
> Users mailing list
> Users@ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
>
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Re: [ovirt-users] 10Gb Networking with OVN

2017-12-11 Thread Dominik Holler
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  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 
> 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  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?
> > >
> > >  
> >
> >  
> 
> 

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Re: [ovirt-users] 10Gb Networking with OVN

2017-12-11 Thread Beau Sapach
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  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  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.sap...@ualberta.ca
*
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Re: [ovirt-users] 10Gb Networking with OVN

2017-12-11 Thread Dominik Holler
Is there an indication that the VMs will not take advantage of 10Gb?

On Thu, 7 Dec 2017 15:27:25 -0700
Beau Sapach  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?
> 
> 

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