[ovirt-users] poor graphic performances with spice

[Nathanaël Blanchet]

Hello Jiri and David,


Le 02/11/2015 10:22, David Jaša a écrit :
> Hi Nathanaël,
>
> On St, 2015-10-28 at 17:06 +0100, Nathanaël Blanchet wrote:
>> Hello,
>>
>> I'm studying a possibility to use ovirt as a vdi solution with centos or
>> fedora guests. But using spice is awfull
> in what sense, just a performance you mention below, or something else?
I'm used to use spice with virt-manager, and I always have been pleased 
with it.
>
>> and graphics are very slow (in
>> particulary videos). Qxl drivers are installed and spice-vdagent works
>> as expected on the guest side.
> What hosts and clients do you use, what is your network environment?
ubuntu spice-client-gtk (0.22) for the client side, and my hosts (latest 
intel CPU and 128 GB of RAM) are centos 7.1 one connected to a FC 
storage domain. The network is a gigabit one. I set my vms with 2GB of RAM.
> When you say centos guests, you mean centos 6 or centos 7?
both. I also tested fedora 22 but I supposed that default gnome 3 shell 
effects could be the reason of the slowness.
>
> David
>
>> However, it is amazing to see that glxgears benchmarks are good...
>> I wonder how it is possible to adopt such a vdi solution when the user
>> experience is so bad.
>> I may miss something and may need recommandations of experimented vdi
>> users :)
>> Thank you for your help.
>>
>
Ovirt is an awesome product, and I've been used to be pleased with its 
great integrated quality tools, that's why I'm supposed to mistake in my 
configuration.
I don't know the vdi part, but problematic is not the same compared to 
the server virtualization. User should have a very good interface 
experience, integrating fluidity and multimedia capabilities.
Sound redirection is okay with no latence, USB redirection works great, 
but watching a youtube video is painful.
The same when moving a simple gui window, there is a big latence.
In comparison, direct RDP session on windows servers gives entire 
satisfaction in graphic rendering.
Please tell me if I do or say something wrong.
Thank you for your job.

-- 
Nathanaël Blanchet

Supervision réseau
Pôle Infrastrutures Informatiques
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blanchet at abes.fr