Changes between Version 21 and Version 22 of vnc3d

Timestamp:

02/19/16 14:10:22 (8 years ago)

Author:

Jens Henrik Goebbert

Comment:

--

vnc3d

@@ -60 +60 @@
 
 {{{ #!ShellExample
-# start job: allocate visualization node
-salloc -N 1 -p vis --gres=gpu:2
+# request allocation on visualization node -> start shell for job submission
+salloc -N 1 -p vis --gres=gpu:0
 
-# start task: an interactive bash on the visualization node
-srun --cpu_bind=none -n 1 --pty /bin/bash -i
+# spawn interactive application 'bash' on the visualization node
+srun -n 1 --pty /bin/bash -i
 
 # create .vnc directory in HOME
@@ -76 +76 @@
 echo "exec startxfce4" > ~/.vnc/xstartup 
 
-# stop task and job
+# exit job and release allocation
 exit 
 exit
@@ -84 +84 @@
 Open an ssh shell on a login node of JURECA the usual way.\\
 
+salloc is used to request an allocation. When the job is started, a shell (or other program specified on the command line) is started on the submission host (login node). From the shell srun can be used to interactively spawn parallel applications. The allocation is released when the user exits the shell.
+
 To allocate a vis node with 512 GByte main memory for one hour, use:
 {{{ #!ShellExample
+# request allocation and spawn VNC server on visualization node
 salloc -N 1 -p vis --gres=mem512,gpu:2 --start-xserver --time=1:00:00
 srun -n 1 --cpu_bind=none --gres=gpu:0 vncserver -fg -geometry 1920x1080
 }}}
-
-Alternatively you may want to allocate a vis node with 1024 GByte main memory by:
-{{{ #!ShellExample
-salloc -N 1 -p vis --gres=mem1024,gpu:2 --start-xserver --time=1:00:00
-srun -n 1 --cpu_bind=none --gres=gpu:0 vncserver -fg -geometry 1920x1080
-}}}
-The default wallclock time is 1 hour, the maximum is 24 hours.
+* -N 1            -> Set number of requested nodes.
+* -p vis          -> Limit request to nodes from the visualization partition.
+* --gres=mem512   -> Set the size of main memory per node (mem512 or mem1024).
+* --gres=gpu:2    -> Set the number of requested GPUs in the range of 0-2.
+* --start-xserver -> Start an Xserver for usage with VirtualGL. 
+* --time=1:00:00  -> Set the default wallclock time to 1 hour (the maximum is 24 hours).
+* Please check 'salloc --help' and 'srun --help' for more details.
 
 In case the VNC server could successfully be started, you will get an output like: