Introduction to Moab for users¶

Moab is the workload management system that is used in FEUP's high performance computing clusters.

Getting started¶

After gaining ssh accesh to a moab frontend, a user can see what resources are available and check the status of the queue by running

mshow

In order to submit jobs, one needs to create a submit script that defines the requirements and the command to be executed. A simple example to get started would be

Example serial job submission script helloworld.submit¶

#!/bin/bash                                                
#MOAB -l nodes=1:ppn=1                                    
#MOAB -l partition=torque1                                 
#MOAB -j oe                                          
cd $PBS_O_WORKDIR                                    
#!/bin/bash
echo "----------------------" 
hostname
echo "----------------------" 
date
echo "----------------------" 
echo "Sleeping 20s" 
sleep 20
echo "----------------------" 
echo "Hello World!" 

Example parallel job submission script helloworld.submit¶

#!/bin/bash                                                
#MOAB -l nodes=2:ppn=2
#MOAB -l partition=torque1                                 
#MOAB -j oe                                          
cd $PBS_O_WORKDIR                                    
mpirun -np 4 -machinefile $PBS_NODEFILE ./command | tee $PBS_JOBID.output

After creating this file, the job would be submitted by running

msub helloworld.submit

Checking status¶

To see details about the status of each job in the queue, one would run

mshow

To check the status of a specific job,

checkjob jobid

To check the status of a specific node,

checknode nodeid

To cancel a job

canceljob jobid

More Information¶

http://www.adaptivecomputing.com/resources/docs/