slurm: srun & sbatch different performance with the same settings

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                          In a slurm system, when I use **srun** command to run the program. It runs very slow and seems like only one processor works.

     srun --pty -A free -J test  -N 1 -n 1 -c 1  mpirun -np 16
     $FEAPHOME8_3/parfeap/feap  -log_summary lu.log

But if I write a **sbatch** script, it can run very quickly and looks like all the processors work. 

    #!/bin/sh -l
    #SBATCH --job-name=test
    #SBATCH --account=free
    #SBATCH --nodes=1
    #SBATCH --ntasks-per-node=24
    #SBATCH --cpus-per-task=1
    #SBATCH --exclusive
    #SBATCH --time=6:00:00
    
    echo ' '
    echo ' ****** START OF MAIN-JOB ******'
    date
    
    srun -n 16 echo y | mpirun -np 16 $FEAPHOME8_3/parfeap/feap -log_summary lu.log
    
    echo ' ****** END OF MAIN-JOB ******'
    
    #End of script

Could anybody please tell me what's going on?
                        

Asked by Rilin Shen (33 rep)

Sep 18, 2017, 01:29 AM
Last activity: Mar 3, 2025, 05:06 PM

slurm: srun & sbatch different performance with the same settings

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