Anshul Gandhi Mor Harchol-Balter Rajarshi Das Charles Lefurgy Optimal power allocation in server farms. 157-168 2009 SIGMETRICS/Performance http://doi.acm.org/10.1145/1555349.1555368 conf/sigmetrics/2009 db/conf/sigmetrics/sigmetrics2009.html#GandhiHDL09