ncl

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• 6.1.2

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----------- Module Specific Help for 'ncl/6.1.2' ------------------

NCL
===

NCL (NCAR Command Language) is an interpreted language designed
specifically for scientific data analysis and visualisation.  This NCL
module includes the NCAR Graphics library.

The website is http://www.ncl.ucar.edu

NCL and the NCAR Graphics library are serial.  

NCL works on the login nodes, compute nodes (serial, and no X display
possible), and serial nodes.

To run on the compute nodes, two environment variables must be set.

The /tmp directory on a compute node is a memory resident file system
and its use to store temporary files could affect performance.  You
can create a temporary directory in your /work directory and use it by
setting the TMPDIR variable for the aprun command, for example, for
user 'mjf' in group 'z01'

mkdir -p /work/z01/z01/mjf/tmp
TMPDIR=/work/z01/z01/mjf/tmp aprun -n 1 ncl

You may need to empty the temporary directory periodically.  If you
really want to use /tmp on the compute node, set TMPDIR to /tmp

TMPDIR=/tmp aprun -n 1 ncl

Set TMPDIR only when you are using NCL on the compute node: setting
TMPDIR permanently can affect other programs.  For example, TMPDIR is
used by the Cray compiler wrappers cc, ftn, and CC; and qsub gives
each job a unique TMPDIR so that these can be cleaned up after the job
completes.

NCL accesses the .hluresfile in your /home directory by default.  This
is not accessible from the compute nodes, set NCARG_USRRESFILE to a
file in your /work directory, for example, for user 'mjf' in group
'z01'

export NCARG_USRRESFILE=/work/z01/z01/mjf/hluresfile

The hluresfile can be empty, or you can use the default provided in
$NCARG_ROOT/share/hluresfile, or you can create your own.

The NCAR graphics library is compiled and linked into programs using
the wrapper programs ncargcc, ncargf90, and ncargf77.  These do not
use the standard Cray wrappers cc and ftn, but use gcc and gfortran
directly.  This module loads the gcc module to enable this.  Note that
unloading the Gnu programming environment (PrgEnv-gnu) will unload the
gcc module and the NCAR Graphics wrappers will not work until you load
the gcc module again.

Maintained by: Mark Filipiak, EPCC