Passtrough M.2 card vs virtual disks!?

[Gerard Oedzes]

Hello proxmox users!

quick question about using nvme m.2 drives.

I have a pcie to m.2 cardholder in my server with a total of 4 drives.

I need a vm with a lot of speed.

In terms of performance, is it better to pass through the whole card or is there no loss when creating virtual disks?

 

[Dunuin]

There will always be some overhead. How much really depends on where/how you store that virtual disk. So PCI passthrough of the M.2 should be fastest, as you skip that overhead (virtualization, mixed blocksizes, nested filesystems, Copy-on-Write, ...).
Best you just test it and benchmark that yourself to see how big the impact in your case with your specific workload would be.

 

[Gerard Oedzes]

Thanks for your reply, that was my feeling too.