1. At least one storage medium having instructions stored thereon for causing a system to: determine a first power metric corresponding to a group of computing nodes that includes first and second computing nodes; and distribute a computing task to a third computing node, and not the first or second computing nodes, in response to the determined first power metric; wherein (a) the first power metric is specific to the group of computing nodes and is not specific to either of the first and second computing nodes; and (b) the first computing node includes a first server separate from and not included in a second server that is included in the second computing node.