Graphical Login (VNC)

Graphical Login (VNC) only with JURECA login possible.

Remote visualization, either implemented within visualization applications themselves or through server software, eliminates the need for off-site file transfers and allows HPC users to run a broad range of visualization tools in-place on the supercomputer where the data resides and more compute resources are available. A graphical login using Virtual Network Computing (VNC) simplifies the access to remote visualization. A broad variety of Linux applications with graphical user interface and/or need for OpenGL can be used directly on the supercomputers via VNC.

VNC provides a complete graphical and remote desktop by

• transmitting the keyboard and mouse events from your computer to the remote machine and
  
• relaying the graphical screen updates back in the other direction.

VNC is

• platform-independent (VNC viewers are available for almost any operating system)
• application-independent (no need for remote visualization support inside the application)
• multiple clients may connect to a VNC server at the same time sharing the same session (support, presentation, group discussions)

... more details

Ok, what do I have to do?

Strudel (Scientific Remote Desktop Launcher) cross-platform application for Linux, MacOS and Windows Strudel should be used to access remote graphical desktop on JURECA developed by the Multi-modal Australien ScienceS Imaging and Visualization Environment (​MASSIVE) team under the NeCTAR-funded ​Characterisation Virtual Laboratory ................................................................................................................................................................................... ==> Download & Install Instructions <==

alternative option)

	vncserver/ssh/vncviewer (manual connection) manual start of VNC server on JURECA manual tunnel for VNC data manual start of VNC viewer on local machine ................................................................................................................................................................................... ==> Install instructions <==

IMPORTANT: Use hardware acceleration in your VNC session

vglrun:
Any OpenGL application running in your VNC session should be started with vglrun to use the hardware acceleration provided by the visualization nodes.

e.g. ParaView

Open a terminal in your VNC session and:

# What versions of ParaView are available?
module spider ParaView

# load ParaView dependency
module load intel-para

# load ParaView
module load ParaView

# start ParaView Server and GUI using VirtualGL for hardware acceleration
srun -n 24 vglrun pvserver
vglrun ParaView

Connect to the pvservers on localhost:11111

e.g. VisIt

Open a terminal in your VNC session and:

# change Stage
module use /usr/local/software/jureca/OtherStages
module load Stages/.Stage1

# What versions of VisIt are available?
module spider VisIt

# load VisIt dependency
module load intel-para/2015.07

# load VisIt
module load VisIt/2.10.0

# start VisIt using VirtualGL for hardware acceleration
vglrun visit -hw-accel

Hints

• press F8 to enter VNC-Viewer Options (example: toggle to full screen)

• sync clipboard between client and server
  Error: Failed to load processor ShellExample

  No macro or processor named 'ShellExample' found

• To reset your VNC-password delete ~/.vnc/passwd

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any feedback welcomed - h.zilken@…, j.goebbert@…