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Can multiple SLURM systems be run in parallel for testing purposes?

April 26, 2017parallel purposes run slurm SYSTEMS Testing

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Can multiple SLURM systems be run in parallel for testing purposes?

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Yes, this is a great way to test new versions of SLURM. Just install the test version in a different location with a different slurm.conf. The test system’s slurm.conf should specify different pathnames and port numbers to avoid conflicts. The only problem is if more than one version of SLURM is configured with switch/elan or switch/federation. In that case, there can be conflicting switch window requests from the different SLURM systems. This can be avoided by configuring the test system with switch/none. MPI jobs started on an Elan or Federation switch system without the switch windows configured will not execute properly, but other jobs will run fine. Another option for testing on Elan or Federation systems is to use a different set of nodes for the different SLURM systems. That will permit both systems to allocate switch windows without conflicts.