Demonstrations

The following X window demonstrations require the computer hosts to be allowed to make connections to the X server where the program output will be viewd. The current distribution, when your X11 host use gdm and other display manager, the X server dose not allow TCP domain connections. In this case, you need to change X server to allow TCP domain connections. For example, you use Fedora Core 3 and gdm, please execute following:

Please edit /etc/X11/gdm/gdm.conf.
Please change the following line:
```
    #DisallowTCP=true
```
to following:
```
    DisallowTCP=false
```
To restart gdm, please reboot the host.
Please login again.

To check X11, please execute following command:

    ps axwww | grep X
If the argument -nolisten tcp  is not found
in /usr/X11R6/bin/X command, the X11 server is OK.
Please set DISPLAY variable to hostname:0.

Mandelbrot using MPC++ MTTL
Under the Single-User Environment:
Issue the following command on your X terminal:
```
	$ xhost +
```
Login to the server host and issue the following commands:
```
	$ scout -g pcc
	$ scrun -nodes=4 /opt/score/demo/bin/mandel
```
The following window should be displayed:
Under the Multi-User Environment:
To execute the Mandelbrot demonstration program written in MPC++ MTTL under the Multi-User Environment, where scored(8) is assumed to be running on the comp3 host, issue the following command:
```
	$ scrun -nodes=4,scored=comp3.pccluster.org \
	        /opt/score/demo/bin/mandel
```
The same window shown above should appear.
Mandelbrot using MPICH-SCore
Under the Single-User Environment:
To execute the Mandelbrot demonstration using the MPICH-SCore program under the Single-User Environment, login to the server host and issue the following commands:
```
	$ scout -g pcc
	$ mpirun -np 4 /opt/score/demo/bin/pmandel
```
The following window should be displayed:
Under the Multi-User Environment:
To execute the Mandelbrot demonstration program using MPICH-SCore under the Multi-User Environment, issue the following command:
```
	$ scrun -nodes=4,scored=comp3.pccluster.org /opt/score/demo/bin/pmandel
```
The same window shown above should appear.

PC Cluster Consotium

CREDIT
This document is a part of the SCore cluster system software developed at PC Cluster Consortium, Japan. Copyright (C) 2003-2004 PC Cluster Consortium.