[ovirt-users] How to benefit from pci-e ssd??

Hi, I wondered if there some setup where we can benefit from pci-e ssds? One possible way is pci passthrough but then the vm does not migrate anymore(am I right?). Another way to share nvme over iscsi, but any software layer between vm and nvme is dumping the performance(maybe worth to try iser or srp?) Ps I have seen that sime cloud providers are offering ssd vms, what does it mean?:)