S Braun: S Braun moved page BwUniCluster2.0/Software/Start vnc desktop to BwUniCluster3.0/Software/Start vnc desktop

2025-08-14T11:14:15Z

S Braun moved page BwUniCluster2.0/Software/Start vnc desktop to BwUniCluster3.0/Software/Start vnc desktop

← Older revision	Revision as of 13:14, 14 August 2025
(No difference)

M Janczyk at 08:28, 21 May 2024

2024-05-21T08:28:22Z

← Older revision		Revision as of 10:28, 21 May 2024
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	* Install: Double click on TurboVNC64-<VERSION>.exe / TurboVNC-<VERSION>.exe. Install in default directory (or chose a different one, if preferred)		* Install: Double click on TurboVNC64-<VERSION>.exe / TurboVNC-<VERSION>.exe. Install in default directory (or chose a different one, if preferred)
	* Execute: Java TurboVNCviewer (vncviewer-javaw.bat in installation directory)		* Execute: Java TurboVNCviewer (vncviewer-javaw.bat in installation directory)

	[[Category:Visualization]]
	[[Category:bwUniCluster_2.0]]

R Barthel: R Barthel moved page Start vnc desktop to BwUniCluster2.0/Software/Start vnc desktop

2022-10-08T00:58:45Z

R Barthel moved page Start vnc desktop to BwUniCluster2.0/Software/Start vnc desktop

← Older revision	Revision as of 02:58, 8 October 2022
(No difference)

R Barthel at 00:40, 8 October 2022

2022-10-08T00:40:36Z

← Older revision		Revision as of 02:40, 8 October 2022
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	[[Category:Visualization]]		[[Category:Visualization]]
	[[Category:~~bwUniCluster~~]]		[[Category:bwUniCluster_2.0]]

H Obermaier: Created page with "The Linux 3D graphics stack is based on ''X11'' and ''OpenGL''. This has some drawbacks in conjunction with remote visualization: * Rendering takes place on the client, not t..."

2017-08-17T12:01:20Z

Created page with "The Linux 3D graphics stack is based on ''X11'' and ''OpenGL''. This has some drawbacks in conjunction with remote visualization: * Rendering takes place on the client, not t..."

New page

The Linux 3D graphics stack is based on ''X11'' and ''OpenGL''. This has some
drawbacks in conjunction with remote visualization:

* Rendering takes place on the client, not the cluster
* Whole 3D model must be transferred via network to the client
* Some OpenGL extensions are not supported when using indirect / client side rendering instead of direct / hardware based rendering
* Many round trips in the X11 protocol negatively influence interactivity
* X11 is not available on non-Linux platforms
* Compatibility problems between client and cluster can occur

To avoid these drawbacks, <code>start_vnc_desktop</code> is provided.
It combines the three open source products [http://www.turbovnc.org/ TurboVNC], [http://www.virtualgl.org/ VirtualGL] and [http://openswr.org/ OpenSWR].

''Virtual Network Computing (VNC)'' is a graphical desktop sharing system.
VNC is platform-independent - there are clients and servers for many
GUI-based operating systems. The VNC server is the program on the
machine that shares its screen. The VNC client (or viewer) is the
program that watches, controls, and interacts with the server. For more
details see: [https://en.wikipedia.org/wiki/VNC Wikipedia]

''VirtualGL'' redirects the 3D rendering commands from Linux OpenGL
applications to 3D accelerator hardware in the cluster. For more details
see: [https://en.wikipedia.org/wiki/VirtualGL Wikipedia]

When no 3D accelerator hardware is available ''OpenSWR'', a high
performance, highly scalable software rasterizer for OpenGL can carry
out the rendering task. For more details see: [http://openswr.org OpenSWR]

This script takes a two step approach to start a VNC server in the
cluster environment:

In the first step the batch system is used to allocate resources where a
VNC server can be started.

In the second step the VNC server is launched on the resources granted
by the batch system. When VNC server is successfully started all
required login credentials and connection parameters will be reported.
To connect to this VNC server a VNC client installation on the local
desktop is required.

= Script usage =

* After login the script can simply be called from the command line:<pre>start_vnc_desktop</pre>
* To get help on the available options use:<pre>start_vnc_desktop --help</pre>
* Hardware rendering is currently only available on FH2 and bwUniCluster, it can be requested with:<pre>start_vnc_desktop --hw-rendering</pre>
* Software rendering is available on all clusters, it can be requested with: <pre>start_vnc_desktop --sw-rendering</pre>
* There is only a limited number of nodes with hardware rendering support, software rendering runs on all nodes.
* For large 3D data sets the software renderer may be faster.
* If neither <code>--hw-rendering</code> nor <code>--sw-rendering</code> is selected no 3D rendering support is available.

= VNC client =

In general every VNC client can be used to connect to the VNC server.
However for best performance and compatibility the use of the
[http://www.turbovnc.org/ TurboVNC] client is recommended.
Below you find the necessary steps for different client operation systems.

; Debian, Ubuntu:
* Download: [https://sourceforge.net/projects/turbovnc/files Download Site] -> latest version -> turbovnc_<VERSION>_amd64.deb
* Install: <pre> sudo apt-get install ./turbovnc_<VERSION>_amd64.deb</pre>
* Execute: <pre>/opt/TurboVNC/bin/vncviewer</pre>

; Red Hat Enterprise Linux, Fedora:
* Download: [https://sourceforge.net/projects/turbovnc/files Download Site] -> latest version -> turbovnc-<VERSION>.x86_64.rpm
* Install: <pre>sudo yum install ./turbovnc-<VERSION>.x86_64.rpm</pre>
* Execute: <pre>/opt/TurboVNC/bin/vncviewer</pre>

; SUSE Linux Enterprise, openSUSE:
* Download [https://sourceforge.net/projects/turbovnc/files Download Site] -> latest version -> turbovnc-<VERSION>.x86_64.rpm
* Install: <pre>sudo zypper install ./turbovnc-<VERSION>.x86_64.rpm</pre>
* Execute: <pre>/opt/TurboVNC/bin/vncviewer</pre>

; ArchLinux:
* Download: Can be installed from the AUR
* Install: <pre>pacaur -S turbovnc</pre>
* Execute: <pre>vncviewer</pre>

; Windows:
* Download: [https://sourceforge.net/projects/turbovnc/files Download Site] -> latest version -> TurboVNC64-<VERSION>.exe for 64-bit, TurboVNC-<VERSION>.exe for 32-bit
* Install: Double click on TurboVNC64-<VERSION>.exe / TurboVNC-<VERSION>.exe. Install in default directory (or chose a different one, if preferred)
* Execute: Java TurboVNCviewer (vncviewer-javaw.bat in installation directory)

[[Category:Visualization]]
[[Category:bwUniCluster]]

BwUniCluster3.0/Software/Start vnc desktop - Revision history

S Braun: S Braun moved page BwUniCluster2.0/Software/Start vnc desktop to BwUniCluster3.0/Software/Start vnc desktop

M Janczyk at 08:28, 21 May 2024

R Barthel: R Barthel moved page Start vnc desktop to BwUniCluster2.0/Software/Start vnc desktop

R Barthel at 00:40, 8 October 2022

H Obermaier: Created page with "The Linux 3D graphics stack is based on ''X11'' and ''OpenGL''. This has some drawbacks in conjunction with remote visualization: * Rendering takes place on the client, not t..."