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Jobs submitted to the general farm of batch systems at SLAC will be scheduled to run according to a cross-queue user-based fairshare priority system.  There is more information here www.slac.stanford.edu/comp/unix/package/lsf/currdoc/lsf_admin/index.htm about this kind of scheduling.  The priority of a user's job is dynamically determined based on various factors such as the number of jobs the user has across all the queues in the fairshare, their resource consumption, the number of shares belonging to the user's fairshare group, etc.  The general farm fairshare queue structure can be viewed with the command "/usr/local/bin/bqueues -l short".   This is an example of what the relevant part of the output from that command looks like at the time of this writing:

renata@rhel6-64g $ bqueues -l short

QUEUE: short
-- Maximum 21 minutes CPU time [SLAC units]. This is the default queue.

...

SCHEDULING POLICIES: FAIRSHARE BACKFILL
FAIRSHARE_QUEUES: short medium long atlasq atl-analq xlong xxl

USER_SHARES:  [glastdataatlasgrp, 128937875] [glastgrpbabarAll, 4057859] [glastuserscdmsALL, 341872000] [hpsprodgrpexoprodgrp, 6001500] [atlasgrpexousergrp, 34307550] [babarAllgeantgrp, 263323874] [cdmsdataglastdata, 1000854] [exoprodgrpglastgrp, 600366] [exousergrpglastusers, 40025320] [rdgrphpsprodgrp, 3421000] [lcd, 418600] [lcdprodgrp, 1100] [luxlz, 8363500] [rpgrp, 418500] [theorygrp, 10004257] [AllUsers, 2294516086]

SHARE SHARE_INFO_FOR: short/

USER/GROUPSHARESPRIORITYSTARTEDRESERVEDCPU_TIMERUN_TIMEADJUST
lcdprodgrp 8361100278.6670000

0.000

exoprodgrp 600200.0001500231.00000000.000
geantgrp3874220.46900000.000
luxlz3500212.36300000.000
hpsprodgrp6001000200.00000000.000
lcd418600139.33300000.000
rdgrp 342114.00000000.000
glastdata 128985413.35200481047.400.000
glastgrp 405 13.086 0 0 143741.5 0 0.00040536613.08600143741.500.000
babarAll 26332 2.497 7 0 54117976.0 3353425 0.0002633278592.4977054117976.033534250.000
glastusers 34187 1.540 1822 0 86034584.0 35653321 0.00034187253201.5401822086034584.0356533210.000
atlasgrp 34307 0.532 4414 0 263242448.0 106437853 0.00034307378750.53244140263242448.01064378530.000
rpgrp 418 0.439 62 0 3924898.2 6360861 0.0004185000.4396203924898.263608610.000
cdmsALL2000cdmsdata 1000 0.418 472 0 5018088.5 19465549 0.00010000.41847205018088.5194655490.000
exousergrp 400 0.414 36 0 4399336.0 287801 0.0004005500.4143604399336.02878010.000
AllUsers 22945 0.414 2104 0 252849040.0 19525638 0.00022945160860.41421040252849040.010525638195256380.000

theorygrp 1000 0.413 91 0 11024314.0 498370 0.000

1000

42570.41391011024314.04983700.000

...

HOSTS: genfells+1 hequfarm+1 dolefarm+1 kisofarm+1 bulletfarm/

Jobs submitted by a user that is not a member of any usergoup will get the priority of the AllUsers group.  Jobs submitted by a user that is a member of a fairshare group may also get the priority of AllUsers if the priority of AllUsers happens to be higher than that of his own group at the time his job is submitted.