Energy efficient scheduling for computing systems and method therefor

A system for managing a datacenter comprising a plurality of racks, each rack having a plurality of servers, comprising:

• at least one cooling system, configured to cool at least one rack;
• a set of stored tables, which record actual rack energy versus performance characteristics, rack utilization statistics, and rack environmental temperature, wherein the respective servers of the plurality of servers have controllable energy versus performance characteristics;
• an ordered queue of tasks to be processed by the plurality of servers;
• a computer implemented model configured to predict an impact of execution of a new task in the ordered queue of tasks on the rack energy versus performance characteristics, rack utilization statistics, and rack environmental temperature, based on the set of stored tables;
• and
• a scheduler, configured to optimize an energy cost for processing the plurality of racks while meeting a task performance constraint and the operating at least one cooling system for cooling the plurality of racks to meet a thermal constraint, by controlling:
• a sequence of, and a respective server employed for execution of the tasks in the ordered queue of tasks to meet the task performance service constraint, and
• the at least one cooling system for the plurality of racks in dependence on the sequence of tasks in the ordered queue of tasks prior to their execution, to meet predicted cooling needs to meet the thermal constraint.