[ovirt-users] Data / ISOs / Export - Domains

Hi there. What are the main diferences between the three types of Domains available that you cannot use one for the all uses. For example, on the same Datastore put Virtual Machines, ISO files (if a filesystem) and Export Machines. Is there anything specific the forbids it which could cause a trouble in mixing files of different types in the same Datastore or is it just a design wish to keep them separate. This could help in the sense that gives more flexibility in more limited scenarios. Also, what is the limitation that is not possible to use Local Storage in a Host the belongs to a Shared Datacenter. What would happend if I have the possibility to run VMs in a Shared Storage and also in Local Storage (or store ISO files for exemple) ? Thanks Fernando