[ovirt-users] ovirt data domain with multi luns, any best practice

Hello, everyone. I had a question on how to create a data domain in the best way. for example, I have a FCP device and there's a lot of hdds and ssds in that device. I ceate 2 luns. one consisting of HDDs and the other consisting of SSDs. I want to make some normal vms run in the lun with hdd and some vms (such as DB) run in the lun with ssd. so, shoud I create one data domain with the 2 luns. or shoud I create 2 difference data domains, and every data domain with a single lun in it? thanks. yours Adam