Newer
Older
!!!warning
This page has not been updated yet. The page does not reflect the transition from PBS to Slurm.
# VirtualGL
VirtualGL is an open source program that redirects the 3D rendering commands from Unix and Linux OpenGL applications to 3D accelerator hardware in a dedicated server and displays the rendered output interactively to a thin client located elsewhere on the network.
See the documentation [here][a].
!!! info
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
## How to Use
**Run VNC**
* VNC Server
Read our documentation on [VNC server][1].
```console
Warning: No xauth data; using fake authentication data for X11 forwarding.
Last login: Tue Mar 3 14:20:18 2020 from vpn-kru0052.it4i.cz
____ _
| _ \ | |
| |_) | __ _ _ __| |__ ___ _ __ __ _
| _ < / _` | '__| '_ \ / _ \| '__/ _` |
| |_) | (_| | | | |_) | (_) | | | (_| |
|____/ \__,_|_| |_.__/ \___/|_| \__,_|
...running on Red Hat Enterprise Linux 7.x
kru0052@login1:~$ vncserver :99
New 'login1.barbora.it4i.cz:99 (kru0052)' desktop is login1.barbora.it4i.cz:99
Starting applications specified in /home/kru0052/.vnc/xstartup
Log file is /home/kru0052/.vnc/login1.barbora.it4i.cz:99.log
kru0052@login1:~$
```
* VNC Client (your local machine)
```console
root@toshiba:~# ssh -L 5999:localhost:5999 kru0052@login1.barbora.it4i.cz -X
```
* Connect to a VNC server from a VNC client (your local machine)
```console
vncviewer localhost:99
```
Or via GUI.
!!! tip
To resize the window scale, use the `xrandr -s 1920x1200` command.
**Run vglclient on the login server (use the terminal in the local machine VNC window)**
```console
kru0052@login1:~$ ml VirtualGL
kru0052@login1:~$ vglclient
VirtualGL Client 64-bit v2.6.1 (Build 20200228)
Listening for unencrypted connections on port 4242
```
**Execute an interactive job on vizserv (use another terminal in the local machine VNC window)**
```console
[kru0052@login1.barbora ~]$ salloc -p qviz -A PROJECT_ID --x11
salloc: Granted job allocation 694741
salloc: Waiting for resource configuration
salloc: Nodes vizserv1 are ready for job
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
```
**New SSH connection on vizserv - elimination of the PBS setting (use another terminal in the local machine VNC window)**
```console
kru0052@login1:~$ ssh vizserv1 -X
Last login: Tue Mar 3 13:54:33 2020 from login1.barbora.it4i.cz
kru0052@vizserv1:~$
```
**Run the graphical application**
```console
kru0052@vizserv1:~$ vglrun /apps/easybuild/glxgears
[VGL] NOTICE: Automatically setting VGL_CLIENT environment variable to
[VGL] 10.32.2.1, the IP address of your SSH client.
libGL error: unable to load driver: swrast_dri.so
libGL error: failed to load driver: swrast
17128 frames in 5.0 seconds = 3425.573 FPS
17251 frames in 5.0 seconds = 3450.128 FPS
...
```
## Examples for Remote Visualization on Barbora Cluster
<div align="center">
<iframe width="854" height="480" src="https://www.youtube.com/embed/BArIbIC_-24"></iframe>
</div>
[1]: ../../../general/accessing-the-clusters/graphical-user-interface/vnc/
[a]: https://www.virtualgl.org/