From redhat documentation I see that the storage for a VM which has to be migrated has to be shared throught some mechanism and I have chosen iscsi.

Anyway I now would need a way to dinamically create a new virtual machine and so a virtual hard disk, note that this vm will have to be migrated too. 

I though about this solution: I would share an HUGE iscsi target, this target is a logical hard drive containing many disk images which would be the VM's hard drives. I can easily clone a vm by making a simple file copy of a vm disk.

This would allow me to create a VM by specifying a path like <iscsi target path>/disk1.img.

I have two problems:

1)how to get an unique <iscsi target path>? On my phisical host it is mounted as a random uuid in the /media folder.

2)will migration work with a <file> instead of a <device> as hard disk field?

If you have any better solution, even involing the change from iscsi to another technology, you are free to propose it to me.

Sorry for bothering,

Pasquale