Memory optimization (was Re: Performance tuning)

[Wesley Ebisuzaki]

Stefan Gofferje wrote:
>   $WGRIB2 ${FILENAME} -undefine out-box -60:100 43:90 -grib_out ${FILENAME}.extracted

The undefine option will set the points outside the box to undefined.
The -grib_out option
writes the file using grib1-style packing (default).  The end result is
a grib2 file using the
same the same grid.

  $WGRIB2 ${FILENAME} -small -60:100 43:90 -grib_out ${FILENAME}.extracted

This command line makes the grid smaller which reduces the memory
requirements.  It uses
grib1-style packing (default).  Note that -small is still beta (please
test first) and you
will need new control files.


    Wesley