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Huge increase of RAM makes parallel mpirun fails

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Old   November 8, 2017, 10:34
Question Huge increase of RAM makes parallel mpirun fails
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Charlie Barraud
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Hello,

I am trying to launch a 2D simulation in my University cluster which runs on SLURM workload manager. My case is quite simple, the mesh being regular and homogeneous.

I tested it on my local machine and there is no problem but when running in the cluster, the RAM hugely increases leading to the fail of the work "slurmstepd: error: Exceeded job memory limit at some point."

The available memory is 45 GB. In my local machine only 2 GB are used anyway. Now the weird thing is that I was so desperate so I tried to run a 2,500,000 cells case which was successful. This randomness is a bit disorientating. Could it come from the MPI settings of the cluster ?



Any one had the same issue ?

I thank you all for your time and hope you can provide me with some help,

Charlie
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cluster computing, mpi error, parallel calculation, ram issues

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