| | 44 | |
| | 45 | == Power == |
| | 46 | |
| | 47 | Note: all measurements were made "at the wall" using a Kill-O-Watt meter. |
| | 48 | |
| | 49 | === Idle Power === |
| | 50 | While idling, the head node draws about 75 Watts and each of the three compute nodes draw 62 Watts for a total of 261 Watts. Of course, if the nodes are not being used, they are manually powered down to stand-by mode (5Watts) and then restarted with WOL (wake on lan). I would like to integrate this into the scheduler. |
| | 51 | |
| | 52 | === Compute Load === |
| | 53 | When it is fully loaded running the HPL benchmark Norbert draws between 371-483 Watts. The number varied as the benchmark progressed which I assumed is an indication of how modern processors are managing power consumption based on load. Even with the maximum power draw, the power performance ratio is a comfortable 10-11 Watts per GFLOPS. |
