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We have 10 windows machines under sun grid(single CPU/4G RAM). Except name, every thing else is same on all these machines. Now we added two new machines to same grid. These two have 16 CPU , 48G RAM.

I would to to instruct Sun GRID Engine that 'prefer the powerful' machine. If these (new boxes) machines heavily loaded only then use the other machines. How can i do this?

Commands are submitted via normal qsub -l [attribute list] [script.sh]

(attribute list is "windows=1,group=it", in this case)

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You can do the following:

  1. change in scheduler config (qconf -msconf) the queue_sort_method from the default load to seqno
  2. update in the queue definition (qconf -mq queue) the seq_no with a default value that is valid for all nodes and a lower value for the powerful nodes

With this config the powerful nodes will be chosen first if they have slots available.

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does it mean the jobs will ignore the "load" altogether? What happens if the powermachine is heavily loaded and weak machine is free? – Jayan Jun 9 '11 at 15:01
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Read man sched_conf for details about that. But basically the way it works is that you can assign the same seq_no to multiple machines. In that case the load is used as a secondary sort method. – Kamil Kisiel Jun 9 '11 at 16:26
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