Maui

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Maui is a job scheduler developped by Adaptive Computing. The scheduler interacts with a resource manager (often Torque) in order to figure out which compute nodes are free and can run jobs. The scheduler then compute, according to a fairshare formula, which job will be run next.

All of Calcul Québec's supercomputers use Maui except Colosse and Guillimin, which rather use Moab, a commercial version of Maui.

Main commands

Since all of Calcul Québec's supercomputers use Torque as a resource manager, those commands can be used. However, some commands can be used to interact directly with Maui:

showq 
displays a list of jobs
showbf 
displays resources available which can be used immediatly using a backfilling algorithm
checkjob 
displays a detailed report for a job
showstart 
gives an estimation of the time at which a task may start
canceljob 
deletes an idle or running job
mjobctl 
modifies attributes of or act on a job
sethold 
put a job on hold
showhold 
display jobs on hold
releasehold 
releases a job (put it back in the idle queue)
setres 
creates a reservation
showres 
shows existing reservations
releaseres 
deletes a reservation
setspri 
changes a job priority
changeparam 
changes a configuration parameter (administrator)
checknode 
shows a detailed report for a node (administrator)
diagnose ou mdiag 
diagnoses a resource, queue, job, etc. (administrator)
mprof 
displays a profile of the system performance (administrator)
resetstats 
reinitialize the scheduler statistics (administrator)
runjob 
run a job immediatly (administrator)
schedctl 
manages the scheduler activity (administrator)
showconfig 
shows the scheduler configuration (administrator)
showgrid 
shows performance statistics (administrator)
showstate 
shows the state of the cluster (administrator)
showstats 
shows utilization statistics (administrator)
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