[maker-devel] Running MAKER with MPI support and SLURM scheduler

[Carson Holt]

Launch with OpenMPI’s mpiexec command. The slurm stun command you are using won’t launch it as expected.

—Carson

> On Mar 12, 2019, at 6:39 AM, Siller, Karsten H (khs3z) <khs3z at virginia.edu> wrote:
> 
> Hi,
> 
> We have configured and installed MAKER 2.31 with OpenMPI 2.1.5 on our HPC cluster.  During build/installation, the MPI libs and mpicc wrapper are found.  This is the output of ./Build status
> 
> ==============================================================================
> STATUS MAKER v2.31.10
> ==============================================================================
> PERL Dependencies:	VERIFIED
> External Programs:	VERIFIED
> External C Libraries:	VERIFIED
> MPI SUPPORT:		ENABLED
> MWAS Web Interface:	DISABLED
> MAKER PACKAGE:		CONFIGURATION OK
> 
> This is how we run MAKER (the number of nodes and tasks are set via #SBATCH directives):
> 
> srun maker > maker_small_PARALLEL
> 
> This launches the correct number of MAKER processes across nodes but we’re seeing messages in the output "WARNING: Multiple MAKER processes have been started in the same directory.”  The processes appear to run ok, but we want to make sure there’s nothing fundamentally wrong with how we run MAKER.
> 
> Browsing the mailing list, I came across similar posts and it was suggested that there’s an issue either with the MAKER MPI configuration or with the scheduler.  We’re positive that the scheduler is configured properly since many other MPI applications run without problems on the cluster with the same scheduler and MPI implementation. 
> 
> Is it possible that launching MAKER processes via srun is not supported?  Or is the warning harmless and can be ignored?
> 
> Thanks,
> Karsten
> 
> —
> 
> Karsten Siller
> University of Virginia
> 
> 
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