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Hardware

The CPU CLX partition offers 982 compute nodes equipped with Intel CPUs. One single compute node holds the following properties.

  • 2x Intel Xeon "Cascade Lake" Platinum 9242 (48 cores per socket)

  • 384 GB RAM
  • Omni-Path

Login nodes

Login authentication is possible via SSH keys only. Please visit Usage Guide.

Generic login nameList of login nodes
blogin.nhr.zib.deblogin1-8.nhr.zib.de

Program build

Once you compiled a binary file (see the Compilation Guide) you need to execute your code. Serial and OpenMP is started directely. For MPI parallelized code you choose between two approaches, namely using srun  or mpirun.

Serial and OpenMP parallel code

Please read the page Workflow compiler how to execute

  • serial code,
  • one OpenMP parallel code, or
  • several OpenMP codes simultaneously.

MPI parallel code

Please read the page Workflow Intel MPI how to execute

  • MPI parallel code or
  • MPI, OpenMP hybrid parallel code.

Please read the page Workflow OpenMPI for details about the MPI library OpenMPI.

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