Techniques for making a replica of a particular group of database objects of a database on a particular node that does not initially have the particular group of database objects include transferring description data from a first node to the particular node during a first time period. A free piston gas compressor is also provided. A turbo setting can be employed to rapidly increase the temperature of the barrel. The bottom wall is substantially parallel to the bottom plate and defines an installing opening. The electronic device can be operated with good emission intensity and have an extended electronic device lifetime compared to an electronic device having edge connectors that can cause local heating. The system comprises: an ink reservoir for storing ink; an ink conduit providing fluid communication between the ink reservoir and the printhead; a pressure device for positively pressurizing the ink reservoir; and a valve in the ink conduit for controlling a supply of ink to the printhead.