The Interaction between Modules, MPI and Parallel Filesystems
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Items to discuss:

#. This is a complicated issue with many parts.
#. Mention Bash startup: What does a non-prompt non-login interactive
   shell mean.
#. MPI startup: non-login interactive shells.
#. Lustre and MDS and finding a module.
#. ibrun passing of the environment
#. Why unguarded module commands are a problem
#. Why TACC makes the module command a no-op when on a compute node.