This all sounds fully reasonable to me. One thing, though... >> * There is a resource class per device category e.g. >> CUSTOM_ACCELERATOR_GPU, CUSTOM_ACCELERATOR_FPGA. Let's propose standard resource classes for these ASAP. https://github.com/openstack/nova/blob/d741f624c81baf89fc8b6b94a2bc20eb5355a818/nova/rc_fields.py -efried .