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This is represented in the job_sort_formula as: pow(2, -(fairshare_tree_usage/fairshare_perc))
or in the qmgr command: qmgr -c 'set server job_sort_formula="pow(2, fairshare_tree_usage/fairshare_perc))"'
This finally allows for a direct comparison between entities, and therefore the jobs that belong to those entities.
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