|
|
To open a session:
|
|
|
|
|
|
**Warning:** access condition are likely to evolve other time to compensate for abuses and allow for a finer tuning of resources usage.
|
|
|
|
|
|
|
|
## Presentation
|
|
|
|
|
|
|
|
## Opening a session
|
|
|
|
|
|
|
|
A session is opened by running a Slurm job through a script we provide: `/etc/slurm/jobvisu.slurm`. You need to specify a time (20mn in this example):
|
|
|
|
|
|
|
```
|
|
```
|
|
|
$sbatch /etc/slurm/jobvisu.slurm
|
|
11:55:35 [alainm@castor visu]# sbatch --time 0:20:0 /etc/slurm/jobvisu.slurm
|
|
|
sq
|
|
Submitted batch job 18111816
|
|
|
|
11:55:55 [alainm@castor visu]# squeue -u alainm
|
|
|
|
JOBID PARTITION NAME USER ST TIME NODES NODELIST(REASON)
|
|
|
|
18111816 visu TurboVNC alainm R 0:05 1 v001
|
|
|
|
```
|
|
|
|
When the session is started, a file is created in your home dir `~/.visu.<jobid>.out`, with the connection informations, including a `vnc_host` and a `password`:
|
|
|
|
```
|
|
|
|
11:56:01 [alainm@castor visu]# more ~/visu-18111816.out
|
|
|
|
account: dsi
|
|
|
|
username: alainm
|
|
|
|
hostname: v001
|
|
|
|
|
|
|
|
vnc_host: v001:1
|
|
|
|
password: s5ZdRF0m
|
|
|
|
11:56:17 [alainm@castor visu]#
|
|
|
|
```
|
|
|
|
Here, the `vnc_host` tells us that a session is waiting for us on display 1 with password `s5ZdRF0m`.
|
|
|
|
|
|
|
|
## Connecting from the client
|
|
|
|
|
|
|
|
From your client machine, using your vnc client (here we use vncviewer), you can now connect to that session on the machine **visu.oca.eu**, on display 1:
|
|
|
|
|
|
|
|
```
|
|
|
|
alainm@jarvis:~$ vncviewer visu.oca.eu:1
|
|
|
|
|
|
|
|
VNC Viewer Free Edition 4.1.1 for X - built Feb 25 2015 22:57:51
|
|
|
|
Copyright (C) 2002-2005 RealVNC Ltd.
|
|
|
|
See http://www.realvnc.com for information on VNC.
|
|
|
|
|
|
|
|
Fri Aug 14 11:57:07 2020
|
|
|
|
CConn: connected to host visu.oca.eu port 5901
|
|
|
|
CConnection: Server supports RFB protocol version 3.8
|
|
|
|
CConnection: Using RFB protocol version 3.8
|
|
|
|
Password: >enter s5ZdRF0m<
|
|
|
|
Fri Aug 14 11:57:14 2020
|
|
|
|
TXImage: Using default colormap and visual, TrueColor, depth 24.
|
|
|
|
CConn: Using pixel format depth 6 (8bpp) rgb222
|
|
|
|
CConn: Using ZRLE encoding
|
|
|
|
|
|
|
|
```
|
|
|
|
You will get a session on wich you can star an xterm and launch some stuff (here we try `/opt/VirtualGL/bin/glxspheres64`):
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
which produce:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
## Closing the session
|
|
|
|
|
|
|
|
Once you're done, de no forget to stop the session to allow other user to use the server:
|
|
|
|
|
|
|
|
```
|
|
|
|
12:12:18 [alainm@castor ~]# scancel 18111816
|
|
|
|
12:12:23 [alainm@castor ~]#
|
|
|
``` |
|
``` |
|
|
|
\ No newline at end of file |
