Access to installed software using Environment Modules
Applications, software, compilers, tools, communications libraries and math libraries of the cluster system are being keep up-to-date. HPC2021 uses the Environment Modules to dynamically set up environments for different applications. Module commands set, change, or delete environment variables that are needed for a particular application. The ‘
module load‘ command will set PATH, LD_LIBRARY_PATH and other environment variables such that user may choose a desired version of applications or libraries more easily. More details can be found here.
Module manipulation commands
||Show the available modules ready for loading|
||Search for available modules matching the keyword(s)|
||Show the details of any modules matching the keyword(s)|
||Show description of a module|
||Load the environment for the default version of the modulefile|
||Load the environment for the default version of modules named modA, modB and modC in corresponding order|
||Load the environment for the specified version of module|
||Roll back configuration performed by the modulefile(s)|
||Unload modulefile A and load modulefile B|
||List any currently loaded module(s)|
||Unload all modules currently loaded|
Module interoperability and dependency
When one module is in conflict with another (e.g different MPI libraries), the conflicting module may have to be unloaded before a desired one is loaded. Besides, some modules may depend on one another and hence they may be loaded/unloaded as a consequence of a subsequent module command in a dynamic fashion.
To achieve automatic loading of a set of commonly used modules upon system login, user may add the module command in the shell profile (.bashrc for bash users, .cshrc for C shell users).
When caching error occurs while listing/loading modules, a user may delete the cache file and run the module command again.
/usr/bin/lua: /home/[user]/.lmod.d/.cache/moduleT.x86_64_Linux.lua:function expression ...
rm -f /home/[user]/.lmod.d/.cache/*.lua