Mozpool
Mozpool
Mozpool is the highest-level interface, where users request a device in a certain condition, and Mozpool finds a suitable device.
Lifeguard
Lifeguard is the middle level. It manages the state of devices, and knows how to cajole and coddle them to achieve reliable behavior.
Black Mobile Magic
BMM is the lowest level. It deals with devices directly, including controlling their power and PXE booting them. Be careful using this level!