[ovirt-users] on-demand machine creation for VDI project

Hi List, I've made an oVirt node installation (oVirt ver. 4.4.9) for a VDI project and I'd like to ask if it is possible to create an empty pool with a maximum number of machine and as the machine are required by the end user (so when the users use the think client to request the provisioning of a machine of the pool in question) the pool will dynamically create the machine and link it to the end user. To specify once more the pool will be create with no machine in it, only a maximum limit on the number of machines, and as the user start connecting to the pool the VM will be created, started and provisioned to the user requesting them. Then when the user stop using the machine they would like the system to save the datas and stop the machine and from that point on when the user will connect the virtual machine connected to their account on the AD system should start. Do you know if this is possibile? Thanks a lot to everybody, Luca