The Interaction between Modules, MPI and Parallel Filesystems

Items to discuss:

1. This is a complicated issue with many parts.

2. Mention Bash startup: What does a non-prompt non-login interactive shell mean.

3. MPI startup: non-login interactive shells.

4. Lustre and MDS and finding a module.

5. ibrun passing of the environment

6. Why unguarded module commands are a problem

7. Why TACC makes the module command a no-op when on a compute node.