Modules

4. Modules#

Overview

Tutorial: 10 min

Objectives: Learn how to find and load modules on Gadi.

Modules are how we manage software in most HPC machines. It provides a way to modify the user’s environment to access required software packages.

Gadi has a large array of software applications installed on its system. These are stored in /apps directory and can be accessed by loading the corresponding module.

4.1. Module Commands#

We can see all the available modules using the command

module avail

To see all the versions of a module, we can use the command

module avail python3

If we want load a module python3/3.11.0 we can use the command

module load python3/3.11.0

If we want to unload the same module use the command

module unload python3/3.11.0

We can unload all the modules using the command

module purge

4.2. Practice: Load the openmpi module#

To build and compile the program from our last practice (hello_mpi.c) into something that can run on Gadi, we need to use the module openmpi to help with the compilation.

Exercise

  1. Check if the openmpi module is available, if so, which versions are available?

  2. Load the openmpi module verison 4.1.5 and check if it is loaded using the command module list.

  3. Once successfully loaded, we can compile the program using the command

mpicc hello_mpi.c -o hello_mpi

This will compile a binary file for you, named hello_mpi. Check the binary file is created.

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