Deploying Ansys on a Slurm HPC Cluster with InfiniBand: Step‑by‑Step Procedure

Deploying Ansys on a Linux HPC cluster that uses Slurm and InfiniBand requires a few specific steps to avoid MPI initialization errors. First, load the Ansys module and verify the license server is reachable. Second, set the MPI_IB_PKEY environment variable to a valid partition key (e.g., 0x8001) before launching the solver. Third, submit a test job with a small mesh and check the output for the absence of “multiple pkey found” messages. If the error persists, revert the variable, consult the cluster’s IB partition table, and repeat the process. Successful runs confirm the deployment is ready for production workloads.