Modules

Eddie makes use of the GNU Modules package to allow for the easy configuration of a user environment. This is especially useful for software such as MPI where the configuration may be quite complex.

To see what modules are available us the following command

$ module available

------------------------/usr/local/Cluster-Config/modulefiles ----------------------------
3.1.6                       hpl/1.0a                    mpich/ge/gcc/64/1.2.7
acml/gcc/64/2.7.0           infinipath/core/gcc/2.1     mpich/ge/gcc/64/1.2.7p1
cluster-tools/2.0.5         infinipath/core/intel/2.1   mpich/ge/intel/64/1.2.7
ddt/32/1.10                 infinipath/ofed/2.1         mpich/ge/intel/64/1.2.7p1
ddt/64/1.10                 infinipath/ofed-legacy/1.0  mpich2/gcc/64/1.0.5/smpd
default-ethernet            installer-tools/2.0.3       mpich2/intel/64/1.0.5/smpd
dot                         intel/cc/9.1.046            netperf/2.4.2
fftw/gcc/64/3.1.2           intel/cce/9.1.046           null
fftw/intel/64/3.1.2         intel/fc/9.1.041            openmpi/gcc/64/1.1
fftw2/gcc/64/double/2.1.5   intel/fce/9.1.041           openmpi/gcc/64/1.2.2
fftw2/gcc/64/float/2.1.5    intel/idb/9.1.046           openmpi/intel/64/1.1
fftw2/intel/64/double/2.1.5 intel/idbe/9.1.046          openmpi/intel/64/1.2.2
fftw2/intel/64/float/2.1.5  lam/gcc/64/7.1.2            opt/32/1.2
gotoblas/core/64/1.09       lam/gcc/64/7.1.3            opt/64/1.2
gotoblas/opteron/32/1.09    lam/intel/64/7.1.2          sge/6.0u8
gotoblas/opteron/64/1.09    lam/intel/64/7.1.3          use.own
gotoblas/prescott/32/1.09   module-cvs                  version
gotoblas/prescott/64/1.09   module-info
gpfs                        modules

To load a module (say the Intel Fortran Compiler)

$ module load intel/fc/9.1.041

And to see what modules you have available

$ module list
Currently Loaded Modulefiles:
  1) sge/6.0u8          2) intel/fc/9.1.041

To remove a loaded module (say the previous fortran module)

module remove intel/fc/9.1.041

There are some subtleties to how module deals with less than complete commands. For example, the following two commands are entirely equivalent

$ module available
$ module avail

But if one issues the following command

module load intel

Then listing the modules shows

module list
Currently Loaded Modulefiles:
  1) sge/6.0u8            2) intel/idbe/9.1.046

So we see that the last matching module in the list is chosen.