Modular Environment

On PSMN, we use Lua Environment Modules (lmod).

There is no default pre-loaded environment, because everything is separate by cluster/partition (See Clusters/Partitions overview). See Installed softwares for a list of all available modules, by cluster/partition.

Important

It is a 3 steps process:

• Initialize,

• choose a list of modules (ie choose a cluster/partition),

• load one or many modules.

At first, you need to initialize:

# into ~/.profile
source /usr/share/lmod/lmod/init/bash

Then use one modules list within a partition:

# for E5 partition
module use /applis/PSMN/debian11/E5/modules/all

# for Cascade partition
module use /applis/PSMN/debian11/Cascade/modules/all

Show available modules:

module avail

Whatis / help / show on a module (ex: foss/2021a):

module whatis foss/2021a
module help foss/2021a
module show foss/2021a

Finally load a module (ex: foss/2021a):

module load foss/2021a

List loaded modules:

module list

Using module:

Unload a module:

module unload foss/2021a

Unload any loaded modules:

module purge

Change from one cluster/partition to another (ex: E5 -> Cascade):

# modules for E5 partition where previously choosen
module unuse /applis/PSMN/debian11/E5/modules/all
module use /applis/PSMN/debian11/Cascade/modules/all

Important

You cannot have two list of modules from different cluster/partition loaded at the same time. lmod will choose either one, and it will not be the right one. If you do so, best of luck.

In a script:

# init
source /usr/share/lmod/lmod/init/bash
# for E5 partition
module use /applis/PSMN/debian11/E5/modules/all
# for Lake partition
#module use /applis/PSMN/debian11/Lake/modules/all
module load foss/2021a

See Installed softwares for a list of all available modules.