Energy efficient workload placement management using predetermined server efficiency data

A method, comprising:

• accessing, for each of a plurality of servers, a previously stored relationship between power consumption efficiency, capacity utilization and ambient air temperature;
• obtaining, for each of the plurality of servers, a plurality of current component power consumption values;
• calculating, for each of the plurality of servers, a current power consumption efficiency using the plurality of current component power consumption values;
• obtaining an amount of capacity utilization necessary to perform a workload;
• determining, for each of the plurality of servers, a predicted power consumption efficiency by identifying a current capacity utilization that the stored relationship associates with the current power consumption efficiency, calculating a predicted capacity utilization value by adding the amount of capacity utilization necessary to perform the workload to the current capacity utilization, and identifying the predicted power consumption efficiency that the stored relationship associates with the predicted capacity utilization value;
• determining, for each of the plurality of servers, any improvement in power consumption efficiency between the current power consumption efficiency and the predicted power consumption efficiency;
• identifying one of the plurality of servers that would experience the greatest improvement in power consumption efficiency;
• and
• assigning the workload to the identified server.

A computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to perform a method comprising:

• accessing, for each of a plurality of servers, a previously stored relationship between power consumption efficiency and capacity utilization;
• obtaining, for each of the plurality of servers, a plurality of current component power consumption values;
• calculating, for each of the plurality of servers, a current power consumption efficiency using the plurality of current component power consumption values;
• obtaining an amount of capacity utilization necessary to perform an additional workload;
• determining, for each of the plurality of servers, a predicted power consumption efficiency by identifying a current capacity utilization that the stored relationship associates with the current power consumption efficiency, calculating a predicted capacity utilization value by adding the amount of capacity utilization necessary to perform the additional workload to the current capacity utilization, and identifying the predicted power consumption efficiency that the stored relationship associates with the predicted capacity utilization value;
• identifying one of the plurality of servers that has the greatest predicted power consumption efficiency;
• and
• assigning the additional workload to the identified server.