Data center managers are being given a hard limit as to how much power they can use. This is a shift from the more common “Reduce power consumption by x%” to “You can use X watts of power” No longer will gradual upgrades work; you must be able to turn things off, completely. Infrastructure virtualization solutions like those from Scalent Systems and Unisys play a key roll here, says Crump. Crump: “Green is more than just increasing power efficiency; it is reducing consumption in real time””]
Source: https://www.darkreading.com/database-security/power-rationing–green-gets-serious