When I install CCI Apps, I end up with a directory that looks like this:

$ ls -1 1NSF.pdb cci_apps_build cci_apps_fedora3_py251.selfx cci_apps_install_script.csh cci_apps_sources nsf_d2_peak.sca test_apps

Which of the bits are optional and can be deleted without affecting the installation?

It seems like the selfx install file is fine to delete.

Yes, it can go.

How about the sources directory?

$ du -k --max-depth=1 62584 ./cci_apps_sources 125840 ./cci_apps_build 225012 .

If the sources directory is not needed, that would save me about 30% of the disk use for the installation, and since I have 2-3 concurrent versions installed, and those versions get pushed around to ~75 machines across the network, every bit I can trim helps.

You definitely need the sources, that's where all the Python scripts live. The C/C++ sources are stripped out already. You can safe about 15MB like this: cd cci_apps_build/lib strip *.so The biggest chunk in the source directory of the current release (yours seems to be older) is the chemical_components library, with about 87Mb. However, only a few individual files will typically go over the network.

As a side note, I think it might be clearer to refer to the "Opteron" builds of the CCI Apps as AMD64 or x86_64. I didn't see anything on the download page that makes this explicit.

Yes, you are right. The naming is historical. If I get a chance I'll change the name to x86_64 for future releases. Ralf