A method, apparatus, system, and signal-bearing medium that in an embodiment determine a group associated with a command, wherein the command comprises a resource-allocating command in a logically-partitioned electronic device and determine when to perform the command based on the group. A content processing system queues content items, such as user-generated blogs, tweets, social networking status updates and other postings, received from a variety of sources. And the controller controls a middle value of a pair of coil currents passed through the respective corresponding coils of the pair of control electromagnets so that the control index value approaches a predetermined target index value. Furthermore, in accordance with routing protocol in which each of nodes changes directivity randomly by a route formation process, it becomes possible to form a more suitable route. The method is useful in removing residual polishing slurry after a chemical-mechanical polishing step, and for removing residues left in via holes after plasma etching.