Hi,

For good performance with Windows VMs you need virtio storage and network devices. To get this in Cloudstack you need to add the Windows ISO or template as "Windows PV".

The problem is Windows does not ship virtio drivers at all, why would they... .. and you cannot mount a second ISO/cd-rom with the virtio-win.iso to get the drivers.
So the solutions are:
1 - build your Windows template somewhere else, like virt-manager or proxmox, then export and register in Cloudstack with os type "Windows PV" 2 - modify the Windows ISO and copy onto it the virtio drivers so you can browse for them and load them

hth

On 2024-11-19 11:15, nilantha liyanage wrote:
no, it uses sata. 
I did not have to install the virtio drivers.
On Tuesday, November 19, 2024 at 12:25:43 PM GMT+4, Wei ZHOU <ustcweiz...@gmail.com> wrote:

I think the vm created by virt-manager also uses virtio driver, isn't it ?



On Tuesday, November 19, 2024, nilantha liyanage
<nilanth...@yahoo.com.invalid> wrote:

  Hi jayanth,
Thanks, it's better now.
How to create one without using virtio, just like how it's created in
virt-manager?.
Also how to improve the performance of novnc console?.
Thanks,Nilantha

On 2024/11/18 06:16:51 Jayanth Babu A wrote:
> Hi,
> Please set the VM / Template setting key “rootDiskController” to
“virtio” and ensure the OS type of the template to be “Windows PV”. Machine
pc-i440fx* should be okay.
>
> Regards,
> Jayanth
>
> From: nilantha liyanage <ni...@yahoo.com.INVALID>
> Date: Monday, 18 November 2024 at 11:30 AM
> To: users@cloudstack.apache.org <us...@cloudstack.apache.org>
> Subject: Windows VM performance on Cloudstack on KVM
> Hi All,
> I just joined the mailing list, I have a question regarding performance
of windows vm running on KVM on cloudstack.
> I installed windows server 2022 on Cloudstack on local disk and it is
slower then when I install it from virt-manager or cockpit, one thing I
have noticed is that the chipset/emulated machine is different when I
install from virt-manager, it is q35 and from cloudstack it's i440fx.
> How do I improve the performance of Windows on Cloudstack?.
> I'm running cloudstack 4.19.1.2 on RHEL 9.3 both Management and agent on
same server.
> Server Details:
> Lenovo System x3650 M5CPU Model: Intel Xeon E5-2699 X 2RAM: 768gb
> Thanks,Nilantha
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