Running With Slurm

[Slurm https://computing.llnl.gov/linux/slurm/] is the queuing system used on Brems. It allows multiple users to put jobs into a queue and the system to negotiate running them optimally. To use slurm with MCNPX do the following: (beta instructions)

Create a script file like this one, substituting your MCNPX parameters at the end of the last line:

#!/bin/bash
#number of processes to run:
#SBATCH -n 8 
export DATAPATH=/opt/mcnpx/data/
srun /opt/mcnpx/v27b_64_mpi_i8_slurm/bin/mcnpx n=14MeV.i

Add your run to the queue:

brian@brems:~/work/maxwell/run15$ sbatch ./runmcnpx
sbatch: Submitted batch job 3

Verify that your run is in the queue:

brian@brems:~/work/maxwell/run15$ squeue
 JOBID PARTITION     NAME     USER  ST       TIME  NODES NODELIST(REASON)
     3     brems runmcnpx    brian  PD       0:00      1 (Resources)
     2     brems runmcnpx    brian   R      11:54      1 brems

You can check the output of your run:

brian@brems:~/work/maxwell/run15$ cat slurm-3.out
mcnpx    ver=27b   ld=Tue Aug 18 08:00:00 MST 2009   03/31/10 19:03:50

*************************************************************
*                                                           *
*                   MCNPX                                   *
*                                                           *
* Copyright 2007. Los Alamos National Security, LLC.        *
* All rights reserved.                                      *
*                                                           *
* This material was produced under U.S. Government contract *

To cancel a queued or running job use scancel:

brian@brems:~$ scancel 3
brian@brems:~$ squeue
 JOBID PARTITION     NAME     USER  ST       TIME  NODES NODELIST(REASON)
     4     brems runmcnpx    brian  PD       0:00      1 (Resources)
     2     brems runmcnpx    brian   R      33:02      1 brems