The fair-share algorithm in SLURM is described at http://slurm.schedmd.com/fair_tree.html.
SCITAS machines have a half-life of one week.
To see the share for your group you can use the "Sshare" command"
$ Sshare
Account User Raw Shares Norm Shares Raw Usage Norm Usage Effectv Usage FairShare Level FS
-------------------- ---------- ---------- ----------- ----------- ----------- ------------- ---------- ----------
scitas-ge 1 0.007752 1376 0.000003 0.000005 1468.763590
scitas-ge aubort 1 0.043478 0 0.000000 0.000000 0.290000 inf
scitas-ge clemenco 1 0.043478 0 0.000000 0.000000 0.290000 inf
scitas-ge cubuk 1 0.043478 0 0.000000 0.000000 0.290000 inf
scitas-ge culpo 1 0.043478 0 0.000000 0.000000 0.290000 inf
scitas-ge degiorgi 1 0.043478 0 0.000000 0.000000 0.290000 inf
scitas-ge eroche 1 0.043478 344 0.000001 0.250000 0.253333 0.173913
scitas-ge nvarini 1 0.043478 0 0.000000 0.000000 0.290000 inf
scitas-ge qubit 1 0.043478 351 0.000001 0.255072 0.250000 0.170455
scitas-ge rezzonic 1 0.043478 681 0.000001 0.494928 0.246667 0.087848
scitas-ge richart 1 0.043478 0 0.000000 0.000000 0.290000 inf
scitas-ge rmsilva 1 0.043478 0 0.000000 0.000000 0.290000 inf
scitas-ge sue 1 0.043478 0 0.000000 0.000000 0.290000 inf
scitas-ge topf 1 0.043478 0 0.000000 0.000000 0.290000 inf
The "Norm Shares" column on the first line is the proportion of the cluster which is allocated to the account and the shares are in terms of cores. Within a group all users have equal weight and so 1 share each.
The value used to decide the priority of a job is the "Level FS" and this is calculated based on the difference between the "Norm Shares" and "Effectv Usage" values. The higher the Level FS, the higher the priority.
A Level FS of less than 1 represents overconsumption. More than 1 means you are underconsuming.
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