Changes between Version 5 and Version 6 of LimulusSoftware

Timestamp:

01/19/11 17:16:55 (14 years ago)

Author:

admin

Comment:

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LimulusSoftware

@@ -1 +1 @@
 == Automatic Power Control ==
 
-One key design component of the new Limulus case is aoftware controlled power to the nodes. This will allow nodes to be powered-on only when needed. As an experiment, a simpel script was written that monitors the Grid Engine queue. If there are jobs waiting in the queue, nodes are powered-on. Once the work is done (i.e. nothing more in the queue) the nodes are powered off).
+One key design component of the new [wiki:LimulusCase Limulus Case] is software controlled power to the nodes. This feature will allow nodes to be powered-on only when needed. As an experiment, a simpel script was written that monitors the Grid Engine queue. If there are jobs waiting in the queue, nodes are powered-on. Once the work is done (i.e. nothing more in the queue) the nodes are powered off).
 
 As an example, an 8 core job was run on the Norbert cluster (in the Limulus case). The head node has 4 cores and each worker node has 2 cores for a total of 10 cores. An 8 node job was submitted via Grid Engine with only the head node powered-on. The script noticed the job waiting in the queue and turned on a single worker node to give 6 cores total, which were still not enough. Another node was powered-on and the total cores reached 8 and the job started to run. After completeion, the script noticed that there was nothing in the queue and shutdown the nodes.