The Nature of the Problem As a 32-bit UNIX system, Linux can handle files not longer than 2Gb. To check your system execute 'ulimit -f' shell command. Since, there is no way to overcome operation system's internal limit, the obvious thing is to split large file into a series of small files.
Parallel execution is the most useful utilization of the idea.
Parallel code can be run on any Linux machine, either Single or Multiple CPU ones. To get it working one does not have to change anything in the system configuration, just compile the program in the parallel mode. Therefore, in the second case 4Gb of data can be handled, and so on, plus 2Gb for each additional copy of gamess program. Using the technique described above it is possible to perform conventional calculations with integral storage on disk for rather big molecules. AT DNA fragment, VRML picture is available as well.