HP Scalable Visualization Array Software - Manual (Page 61)

IMPORTANT: Note that the you may lose the video display; however, the keyboard and mouse
continue to work such that you can actually control the multi-tile image. This is because the
multi-tile display device may be using a resolution that is unsupported by the KVM or RKM.
You should be able to use the arrow keys to move among the various cluster nodes, including
the head node.
Figure 6-3 shows the relationships among the processes that run when you launch a visualization
job.
There are four processes that must run when a visualization session begins:
• The X Servers.
• Xdmx.
• Chromium.
• The visualization application.
Xdmx is a process that begins when you submit a visualization session. It must be launched
before the application. Xdmx is the single frontend proxy X Server that acts as a proxy to a set
of backend X servers; thus there is a single instance of Xdmx running on one of the display nodes.
Figure 6-3 Processes Running with Chromium-DMX Script
GFX
GigE
GigE
SI
To External
Network
To Display
Device
Xdmx
Application
X Server
External Node
Display Node 1
DMX
Window
Console
GFX
GigE
Display Node 2
X
cursor
Display Device (2 tiles)
To Display
Device
Keyboard
Chromium
SI
GigE
X Server
X Server
Chromium
6.3.5 Data Access
For a serial application that uses Chromium, place the data files in a convenient location for your
site configuration. One location that provides fast access to data is on a local disk on the Execution
Host (the node running your application). Given that the application in this example runs on a
single node, there is little to be gained by distributing the data. You can choose the /tmp directory
to store data on the local disk.
6.3 Running a Workstation Application Using a Multi-Tile Display 61