Update fem_software.md

Added version of distributed mapdl

doc.zih.tu-dresden.de/docs/software/fem_software.md

@@ -188,13 +188,88 @@ that you can simply change to something like 16 or 24. For now, you should stay
 boundaries, because multi-node calculations require additional parameters. The number you choose
 should match your used `--cpus-per-task` parameter in your job file.
 
-### Running MAPDL in Interactive Mode
+### Running MAPDL
 
 ANSYS Mechanical APDL (sometimes called ANSYS Classic, the older MAPDL scripted environment).
 
+### SMP (1 node only)
+
+#### Interactive mode
+
+```console
+marie@login$ srun --partition=haswell --nodes 1 --ntasks-per-node=4 --time=0:20:00 --mem-per-cpu=1700 --pty bash -l
+```
+
+```console
+marie@node$ module load ANSYS/2021R2
+marie@node$ mapdl -smp -np $SLURM_NTASKS
+```
+
+#### Batch mode
+
+```bash
+#!/bin/bash
+#SBATCH --nodes=1
+#SBATCH --ntasks-per-node=4
+#SBATCH --mem=2000
+#SBATCH --job-name=ansys_mapdl
+#SBATCH --output=output_ansys_mapdl
+#SBATCH --time=01:00:00
+
+module load ANSYS/2021R2
+
+# -smp use shared memory parallel version
+# -b (batch mode)
+# -np specify number of cpu's to use
+# -j jobname
+
+mapdl -smp -b -np $SLURM_NTASKS -j solution -i <input-file>
+```
+
+
+```console
+marie@login$ sbatch mapdl_job.sh
+```
+
+### Distributed (n nodes)
+
+#### Interactive mode
+
+```console
+marie@login$ srun --partition=haswell --nodes 4 --ntasks-per-node=4 --time=0:20:00 --mem-per-cpu=1700 --pty bash -l
+
+# generate node list 
+marie@node$ NODELIST=$(for node in $( scontrol show hostnames $SLURM_JOB_NODELIST | uniq ); do echo -n "${node}:${SLURM_NTASKS_PER_NODE}:"; done | sed 's/:$//')
+
+marie@node$ KMP_AFFINITY=none mapdl -machines $NODELIST
+```
+
+#### Batch mode
+
+```bash
+#!/bin/bash
+#SBATCH --nodes=4
+#SBATCH --ntasks-per-node=4
+#SBATCH --mem=2000
+#SBATCH --job-name=ansys_mapdl
+#SBATCH --output=output_ansys_mapdl
+#SBATCH --time=01:00:00
+
+module load ANSYS/2021R2
+
+# generate node list 
+NODELIST=$(for node in $( scontrol show hostnames $SLURM_JOB_NODELIST | uniq ); do echo -n "${node}:${SLURM_NTASKS_PER_NODE}:"; done | sed 's/:$//')
+
+# -b (batch mode)
+# -machines xxx   specify machines list for distributed Ansys
+# -j jobname
+setenv KMP_AFFINITY none
+
+mapdl -b -machines $NODELIST -j solution -i <input-file>
+```
+
 ```console
-marie@login$ srun --partition=haswell --ntasks=1 --cpus-per-task=4 --time=1:00:00 --mem-per-cpu=1700 --pty bash
-marie@node$ mapdl -smp
+marie@login$ sbatch mapdl_job.sh
 ```
 
 ## COMSOL Multiphysics