An integrated circuit interconnect structure includes a conductive line, a first barrier layer disposed on a bottom surface of conductive line, a second barrier layer disposed on the top surface of the conductive line, and an interlevel dielectric surrounding the conductive line. A VM’s state is serialized and written to disk in the form of key values that are used to retrieve data from a key-data map. The stationary tube is configured to communicate substantially at or near the proximal end with a pressurized air source The rigid rotor has a distal end rotatably coupled substantially at or near the distal end of the stationary tube, a proximal end comprising an outlet port substantially at or near the proximal end and a rotor passage in fluid communication with the stationary tube.