Jureca/Software

Software on JURECA

Access to installed software on JURECA is organized through a hierarchy of modules.

Show what modules are compatible available to load right now (given the toolchain modules you have already loaded):
```
module avail
```

Load a specific version of a module

module load <modulename>/<moduleversion>

List what modules are currently loaded
```
module list
```

Unload a module

module unload <modulename>/<moduleversion>

Unload all modules
```
module purge
```
Find the location of a module within the module hierarchy
```
module spider <modulename>
```
Show how to load NetCDF:
```
module -r spider '.*netCDF.*'
```

Module Stages

On JURECA there are major software updates every 6 month (in May and November).

These updates are called stages.

New stages require that user applications are recompiled.

To use "old" executables without recompiling or to create executables with older compiler versions, old stages can be loaded with:

module use /usr/local/software/jureca/OtherStages
module load Stages/xxx

e.g. : load old Intel compiler with parastation MPI and netCDF:

module purge       
module use /usr/local/software/jureca/OtherStages   
module avail
module load Stages/2018b
module load intel-para
module load netCDF-Fortran

Module Collections

Once users have the desired modules load they can save this to a named collection with:

```
module save <collection_name>
```
This creates a file called ~/.lmod.d/<collection_name> with the list of desired modules.

Once this is set-up a user can restore that named collection with:

```
module restore <collection_name>
```
and only the desired modules will be loaded.

Print the contents of a collection with:

```
module describe <collection_name>
```

List all collections:

```
module savelist
```

Disable a collection with:

```
module disable <collection_name>
```