Hi All

 

I'm currently running 4 Vm's but will really need to end up with 5:

 

1x windows server 2019 -Domain controller VM

3x windows 10 (soon to be x4) -Gaming Vm's

 

Specs of the whole system:

thread ripper 2970WX -24core  (4 cores /8threads per gaming VM) (2 core/4thread for domain controller)

64gb ram

3x RX 6600 (soon to be x4)

2x 1tb WD Green 1TB 2.5 inch

2x 500gb 2.5 inch (1 Samsung 1 crucial)

 

the ssds are currently:

parity 1 : 1tb 

disk 1: 1 tb

disk 2:500gb

disk3: 500gb

 

My original goal was to be able to have 4x win10 Vm's running at the same time each with a GPU passed through. Only needing 1 copy of each game that each Vm can access so that i dont need to have 4 copies of each game, 1 stored on each VM.

 

I guess i really have 3 questions:

 

#1) when running multiple VM's each VM becomes rather slow, is this because i really need to be using m.2's ?

#2) or is this because the storage should be setup a different way? possibly a dedicated physical drive per VM?

#3) is there anything im missing that could be either causing these issues or that might in the future.

 

Thanks in advance, please let me know if you need anymore info and / or screenshots to aid in my explanation.

Try leaving more resources available to the host and see how it goes. Keep in mind that pretty much all the motherboard functions in a VM are emulated in software, so if the host doesn't have enough resources to emulate them smoothly you will have issues.

 

I always advise giving each VM the bare minimum needed to run, then gradually increase resources until you no longer notice any speed benefit, then back off 1 tick. For example, give each VM 1 core and 4GB RAM to start. See how they perform simultaneously. Then ramp up to 2 cores, 8GB and retest.

 

Resources given to the guests are lost to the host completely, where host resources can be allocated to speed up and improve all the underlying I/O. Starve the host, and you guarantee bad performing guests, no matter how many cores and RAM you give them.

On 7/19/2022 at 9:00 AM, JonathanM said:

Try leaving more resources available to the host and see how it goes. Keep in mind that pretty much all the motherboard functions in a VM are emulated in software, so if the host doesn't have enough resources to emulate them smoothly you will have issues.

 

I always advise giving each VM the bare minimum needed to run, then gradually increase resources until you no longer notice any speed benefit, then back off 1 tick. For example, give each VM 1 core and 4GB RAM to start. See how they perform simultaneously. Then ramp up to 2 cores, 8GB and retest.

 

Resources given to the guests are lost to the host completely, where host resources can be allocated to speed up and improve all the underlying I/O. Starve the host, and you guarantee bad performing guests, no matter how many cores and RAM you give them.

Thanks so much, makes perfect sense. ill give this a go and see where we end up. hoping its something simple like ram allocation. really dont want to go and get another higher core threadripper cpu haha.