Hello, On Mon, Jan 4, 2021 at 8:41 AM <ozmen62(a)hotmail.com&gt; wrote: 40 concurrent spice connections or 40 active VMs? What type of VMs? - Gilboa

Sadly enough we never had more than 20+ concurrent spice connections and most of them were text consoles. In this case, our 40/10GbE link(s) were mostly idle. That said, there's a vast difference between spice displaying VGA resolution and spice displaying 2K/4K resolution. Hence my question about the type of VMs and by extension, the resolution used. BTW, stupid question: Have you tried running iperf3 (or a similar tool) between your client machines and the oVirt cluster to verify that indeed you have 10GbE of usable bandwith? - Gilboa On Wed, Jan 6, 2021 at 10:58 AM <ozmen62(a)hotmail.com&gt; wrote:

On Thu, Jan 7, 2021, 16:14 <ozmen62(a)hotmail.com&gt; wrote: Assuming xyz.example.com is in the display network you need to find out what is throttling you at these values. No, they should not be related Because, if there is, it might be the source of the problem.

Hi, Let me share our experience with VDI and spice. First I do not have a solution to make the spice server more reactive. Here is our current infra: 12 hosts with Xeon processor with 10G port and a couple of hundreds of memory per host. This runs around 55 VMs 40 of them are servers vms and 15 desktops VMs . running Ubuntu/Windows The desktop vms are accessed from a Windows machine on a 1G network. Laggy for us is if we move a window and the mouse does not precisely move with the windows then it is laggy. So with our current setup spice server is not usable. The offset of the mouse vs windows is a couple a inches. It is like moving a window attached to an elastic band. RDP to a windows vm is snappy. RDP to a xrdp server on Ubuntu running Gnome is laaagy. The only usable remote desktop protocol we are able to use is Xpra and the NX protocol. Xpra in seamless mode is by far the snapiest and faster protocol. The problem with Xpra is some stability issues. But the support from the dev is amazing. The NX protocol is also a good choice. The x2go variant is a good seamless option. It is as fast as Xpra but the Xpra has a sharper rendering. There is also nomachine software( creator of the NX protocol) that has the best desktop experience. I think you can try it for free for 30 days and the licencing is not that expensive. I always ask myself the question why RDP on windows is way better than the other options. Even the xrdp server is no match even using the same windows client. Is this related to the windows env.(i.e gnome) or the Xserver.. So if you find a way to make the spice server more snappy i would like to know. Maybe a seamless mode for spice server could help. Regards. On Fri, Jan 8, 2021 at 12:05 AM <ozmen62(a)hotmail.com&gt; wrote:

Thanks for all, Clients have 1Gb and iperf3 results are 900Mb per client, if multiple client run at same time. I think client and server network is ok. I've figured out something else. On Host setting there is an option for "console and gpu". separated or consolidated. It's made me suspected that the issue might come from this. I've checked my gpu which is onboard lshw -C Display *-display description: VGA compatible controller product: MGA G200eH3 vendor: Matrox Electronics Systems Ltd. physical id: 0.1 bus info: pci@0000:01:00.1 logical name: /dev/fb0 version: 02 width: 32 bits clock: 33MHz capabilities: pm msi pciexpress vga_controller bus_master cap_list rom fb configuration: depth=32 driver=mgag200 latency=0 resolution=1024,768 resources: irq:17 memory:d8000000-d8ffffff memory:d9b98000-d9b9bfff memory:d9000000-d97fffff memory:c0000-dffff Spice uses gpu, RDP uses cpu. So, maybe if i change my primary gpu with some powerful one it can effect spice in a good way What do you think about that?

ı've checked my network usage and it's ok. No problem. But, there is another problem which we've already knew. Our storage I/O is bad. It might be the some part of the problem. I know this is getting out of the main subject. But, one thing i want to learn if some of you can help help in os.conf files there ar 2 values os.windows_10x64.devices.display.vramMultiplier.value os.windows_10x64.devices.display.vgamemMultiplier.value i've created override con file to change these, restart engine and install new w10x64 But, does not effect vram value. is's still 4GB shared memory How can i increase the vgamemory to test if makes better performance or not? Thanks