Calc
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:
Contents |
1 Direct Access
via ssh from your client machine within VLAN-168.
Prerequisites:
- ssh client
- X server
an X server is needed if graphics shall be displayed, staying in text mode you would not need it.
1.1 work-flow
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
- make your data available
- either by running a script to get your lucky-data
mount_lucky <lucky_user>
- or some secure-copy transfers
scp <my_local_data> <remote_user>@calc.isor.univie.ac.at
- start your calculations, e.g
matlab
- transfer your outcome and delete your original data (if you don't use it any more)
2 Virtual Desktop
you can use a virtual desktop to login there first, then access the calc server.
Prerequisites:
- vnc-client
yum install tigervnc or apt-get install tigervnc-viewer or similar viewers for windows, etc.
or
- web-browser
2.1 work-flow
connecting through a virtual deskstop another username/password pair is necessary. Your username is mapped to the <Display> number, your password is just the same. start your vnc-client on your laptop
vncviewer 131.130.97.100:<Display>
or - even better tunnel the session through ssh
vncviewer -via <remote-user>@calc.isor.univie.ac.at localhost:<Display>
or use a web-browser and allow an unsigned applet to run, calculate your Port := 5800+<Display>
http://calc.isor.univie.ac.at:Port
Use your Virtual Linux Desktop's terminal (e.g. gnome-terminal) and continue as described in 1). Start your calculation and close the viewer if you like. On any machine in VLAN-168 you can open a viewer and continue.
