Power management using dynamic application scheduling

1. A method, comprising:

selecting a power limit for a datacenter having a plurality of servers;

determining a power consumption attributable to each of a plurality of applications executable on one or more of the servers for each of a plurality of different server types;

queuing the applications for execution on the servers as jobs; and

controlling execution of the jobs such that the total power consumption attributable to the applications currently being executed as jobs remains within the selected power limit for the datacenter.

2. The method of claim 1 , wherein the step of determining power consumption attributable to each of a plurality of applications executable on one or more of the servers comprises:

determining a baseline power consumption of a selected server;

executing a selected application on the selected server; and

determining the difference between the baseline power consumption and the power consumption of the server during execution of the selected application.

3. The method of claim 1 , wherein the power consumption attributable to each application is selected from the group consisting of a minimum power consumption, a maximum power consumption, and an average power consumption attributable to the respective application.

4. The method of claim 1 , further comprising:

executing the queued jobs such that the total power consumption attributable to the currently executed jobs does not exceed a maximum power consumption limit for the datacenter.

5. The method of claim 1 , further comprising:

executing the queued jobs such that the total power consumption attributable to the currently executed jobs does not fall below a minimum power consumption limit for the datacenter.

6. The method of claim 1 , further comprising:

determining a datacenter power margin as the difference between the present total power consumption attributable to the currently executed jobs and an upper power limit for the datacenter; and

executing the next queued job only if the power consumption attributable to the next queued job is less than the datacenter power margin.

7. The method of claim 6 , further comprising:

determining when one or more presently running jobs has completed and, in response to the completion, repeating the steps of determining the datacenter power margin and executing the next queued job only if the power consumption attributable to the next queued job is less than the datacenter power margin.

8. A computer program product including computer usable program code embodied on a non-transitory computer usable storage medium for managing power in a datacenter, the computer program product including computer usable program code for:

selecting a power limit for a datacenter having a plurality of servers;

determining a power consumption attributable to each of a plurality of applications executable on one or more of the servers for each of a plurality of different server types;

queuing the applications for execution on the servers as jobs; and

executing the queued jobs such that the total power consumption attributable to the currently executed jobs remains within the selected datacenter power limit.

9. The computer program product of claim 8 , wherein the computer usable program code for determining power consumption attributable to each of a plurality of applications executable on one or more of the servers comprises computer usable program code for:

determining a baseline power consumption of a selected server;

executing a selected application on the selected server; and

determining the difference between the baseline power consumption and the power consumption of the server during execution of the selected application.

10. The computer program product of claim 8 , wherein the power consumption attributable to each application is selected from the group consisting of a minimum power consumption, a maximum power consumption, and an average power consumption attributable to the respective application.

11. The computer program product of claim 8 , further comprising:

computer usable program code for executing the queued jobs such that the total power consumption attributable to the currently executed jobs does not exceed a maximum power consumption limit for the datacenter.

12. The computer program product of claim 8 , further comprising:

computer usable program code for executing the queued jobs such that the total power consumption attributable to the currently executed jobs does not fall below a minimum power consumption limit for the datacenter.

13. The computer program product of claim 8 , further comprising computer usable program code for:

determining a datacenter power margin as the difference between the present total power consumption attributable to the currently executed jobs and an upper power limit for the datacenter; and

executing the next queued job only if the power consumption attributable to the next queued job is less than the datacenter power margin.

14. The computer program product of claim 13 , further comprising computer usable program code for determining when one or more presently running jobs has completed and, in response to the completion, repeating the steps of determining the datacenter power margin and executing the next queued job only if the power consumption attributable to the next queued job is less than the datacenter power margin.