HP Scalable Visualization Array Software - Manual (Page 42)

The primary mechanism that you use to set up displays is the Display Surface. A Display Surface is composed
of one or more display nodes and their associated display devices; for example, a simple Display Surface
is a specific display node and an attached flat panel display device. Initial configuration of the SVA sets up
a series of default named Display Surfaces, one for each display node and its directly cabled display device.
Your site administrator needs to define multi-tile Display Surfaces using the Display Surface Configuration
Tool. This tool can also list all the named Display Surfaces for the cluster. A named Display Surface is a key
input to the launch script. Entering specific Display Surfaces to the script is the way you access the display
resources of the cluster.
Refer to the SVA System Administration Guide for details on setting up Display Surfaces, display nodes, and
display devices.
Launch Script
The SVA Software Kit installs a script that you can use to launch standard X and OpenGL visualization
applications. The script derives key input parameters from the Configuration Data Files. You can override
some of these default values by creating a User Configuration File or by direct input on the command line.
The key pieces of data you need to provide when you start the launch script are the following:
•
The node's X Display where the DMX Console Window appears. It is taken from the operating system
DISPLAY
environment variable. You must set this correctly before you launch the script or it fails. For
example:
% export DISPLAY node:0.0
You can set the display to a local desktop that has access to the SVA. Once the application is running,
you can provide input using the DMX Console window on the local desktop. Using the DMX Console
window typically requires that you can view the main SVA Display Surface. See the DMX documentation
for a description of the DMX Console window. A link is available in the SVA Documentation Library.
•
The invocation command for your application.
•
The name of the Display Surface on which to display the application output.
You begin by logging in to the SVA using a terminal window. The following command runs the atlantis
application on the FULL_DISPLAY Display Surface using the DMX-Chromium launch script. Note the use
of the application-specific command line parameter: -count 20. Launch scripts must start from the head
node.
% sva_chromium_dmx.sh -d FULL_DISPLAY \
"/usr/X11R6/lib/xscreensaver/atlantis -count 20"
For details on the syntax of the Chromium script, see the SVA Visualization System Software Reference Guide
or the sva_chromium_dmx.sh manpage.
You can also run applications interactively using this script. See “Running an Interactive Session” (pg. 29) .
42 Application Examples