Once you have connected to a TACC system through the Analysis Portal and are running ParaView in parallel, you can perform a test to see how it is working. The following example demonstrates how the data used in a visualization is distributed among the available processors. The data is made up of many triangles, and each triangle will be assigned to one of the ParaView processes. We will use each triangle's process ID number to color that triangle. Perform the following steps:

• Select Sources→Geometric Shapes→Sphere.
• Set "Theta Resolution" and "Phi Resolution" both to 32, then click "Apply".
• Under "Display", set "Representation" to "Surface With Edges".
• Set "Coloring" to "vtkProcessId" (the process ID number). If this option is not present in the dropdown, the most likely explanation is that your request for the Analysis job only specified one "Task". In this case, you must stop this job and request a new one with the right number of tasks.
• Click "Apply".

Notice that the colors of the sphere's triangles vary based on their location around the sphere. There are 32 pole-to-pole strips of triangles, and ParaView has sent two strips of triangles to each of the 16 processes that were requested in the Analysis Portal. The ID numbers of those nodes are used to select colors from the default look-up table.

When you are finished using ParaView on the TACC node and want to terminate your session, click in the small terminal window with the red background and click the Enter key. Once the desktop disappears from the DCV or VNC display, return to the Analysis Portal page to terminate the job (if desired) using its "End" or "End Job" button. Until this is done, the job will continue to run and you can reconnect to it, but it will continue to spend your allocation until it is terminated.