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[[Category:HPC-Admin|Module Systems]] [[Category:HPC.NRW-Best-Practices|Module Systems]] = Software = * [https://lmod.readthedocs.io/en/latest/ LMOD] ** Actively developed ** Integrated by EasyBuild ** In-build module usage tracking ** Support for different module naming schemes ** Supported languages: Lua and TCL ** Installation via [https://openhpc.community/ OpenHPC] repository package * Alternative: [http://modules.sourceforge.net/ Environment Modules] ** Stale development ** Since 2018 new maintainer ** Supported languages: TCL = Naming Conventions = We are employing a so-called [https://easybuilders.github.io/easybuild/files/hust14_paper.pdf hierarchical module naming scheme]. This means that only those modules are shown to the user which '''can''' be loaded based on the current user environment. Example: A user wants to load the module '''GROMACS''' which depends on the '''GCC''' compiler and open '''OpenMPI''' library. By default the user can only see the GCC module: 1. module load GCC –&gt; now the OpenMPI module is visible 2. module load OpenMPI –&gt; now the GROMACS module is visible 3. module load GROMACS = Module Usage Tracking = * Tracking of module usage can directly be integrated into LMOD –&gt; see https://lmod.readthedocs.io/en/latest/300_tracking_module_usage.html * Rquirements: MariaDB (MySQL) and rsyslog functionality * '''NOTE:''' Clone the [https://github.com/TACC/Lmod git repository] and look into the folder <code>contrib/tracking_module_usage</code> to find the examples and scripts described in the guide above = Deprecated Modules = * Create a separate software stack every 6 to 12 months and create ''meta'' modules for the users to explicitly load a specific ''year'' –&gt; e.g. <code>module load 2020a</code> * This way, users get a feeling for how old their used software is * You can easily deprecate older software stacks by just deleting the meta module but at the same time keep the software stack for archival purposes * Module trees do not get cluttered

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