The Calc server is used for remote computing. Local user accounts are provided therefore. calc.isor.univie.ac.at can be accessed in 2 ways.
1 Functional Range
Use remote computing @calc for medium large operations. For small Operations use your laptop, for large ones Ivana's cluster. Coordinate with your colleagues, and use gkrellm to monitor system resources. (30% virtualisation-overhead might be indicated)
Your data is your responsibility, since this server is not part of a BACKUP routine. Transfer your data (e.g. code and time-series) back onto your laptop or onto your share of our Institutsserver.)
3.1 via Direct Access
- VPN client (no need within VLAN-168)
- ssh client
- X client
an X server is needed if graphics shall be displayed, staying in text mode you would not need it.
Your console (terminal) still controls the session, so if e.g. your laptop runs short on batteries, your calculation is interrupted and lost.
- login at the remote host calc.isor.univie.ac.at
ssh -X <remote_user>@calc.isor.univie.ac.at
the first time you might want to check the host-keys:
a6:b2:e6:b2:69:79:03:2d:dc:a8:32:f3:9d:36:b1:e3 (ECDSA) 31:9a:05:c8:02:83:58:da:4e:3a:92:36:8c:89:29:c4 (RSA)
- make your data available
- either by running a script to connect your vladimir-data
(only if you have got an account at the institutsserver, i.e. being staff)
- or some secure-copy transfers
scp -r <my_local_data> <remote_user>@calc.isor.univie.ac.at
- start your calculations, e.g
- transfer your outcome and delete your original data (if you don't use it any more)
or disconnect from vladimir
3.2 via Virtual Desktop
you can use a virtual desktop to login the calc server.
- F5 for connecting to the UNI-VPN
- vncviewer to connect to your Desktop
3.3 via sftp and WEB-R
- F5 for connecting to the UNI-VPN
- sftp (e.g. FileZilla) to upload your workspace
- http://calc.vdc.ac:8787 to do your R
- VPN client (can be omitted within VLAN-168)
- vnc-client like tigervnc (former tight-vnc)
yum install tigervnc or apt-get install tigervnc-viewer or similar viewers for windows, etc.
- java enabled web-browser to run an unsigned applet (which normally causes troubles)
- Establish a VPN tunnel to begin with.
- Make sure to be within the VPN university subnet.
- start your vnc-client
(Technically, connecting through a virtual desktop another username/password pair would be necessary.) Your username is mapped to the port:=5900+<Display> number, your password is just the same anyway.)
or - even better tunnel the session through ssh
vncviewer -via <remote-user>@calc.isor.univie.ac.at localhost:port
Best to use the Full-Screen-Mode, note the keys how to escape, e.g. <Strg> + <Alt> + <Shift> + <F> Don't forget to close the vncviewer before opening it at another host to get the geometry-settings right. Some viewers like viagre disable sending special keys by default (<Strg>+<Q> in this case). Make sure to enable them, just not to get locked out in FullScreen mode.
If you use a java-enabled web-browser and allow an unsigned applet to run, calculate your Port := 5800+<Display>
Use your Virtual Linux Desktop's terminal (e.g. gnome-terminal) and continue as described in 1). Start your calculation and close the viewer. Within the VPN uni-subnet or VLAN-168 you can re-open a viewer and continue.
Avoid switching to full-screen, because vnc might get into troubles.
Open a terminal via e.g. Application > Favorites > Terminal. At the command-prompt put in matlab. After the licensing server is asked for authorization the GUI starts up. Don't close this terminal, since it's the controlling terminal for Matlab. Alternatively press <Alt>+<F2> and fill in matlab. You can also use matlab in text mode from the command line.
3.4.2 R studio
edit R source files in some text-editor and run it afterwards, or use rstudio. you might also want to secure-copy files in your server share and run R-studio in a web browser: http://calc.vdc.ac:8787
some python-libs for finance have been installed on request.