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=== Remote windows with X11-forwarding ===
=== Remote windows with X11-forwarding ===


In general, X11-forwarding should be avoided for any heavy graphics, as it requires many round trips and is much slower than VNC (below). However, in some cases you can connect via ssh with X11. Below we show how you would do this on Niagara. We assume you have an X-server installed on your laptop.
In general, X11-forwarding should be avoided for any heavy graphics, as it requires many round trips and is much slower than VNC (below). However, in some cases you can connect via ssh with X11. Below we show how you would do this on our clusters. We assume you have an X-server installed on your laptop.
 
<tabs>
<tab name="Cedar and Graham">
 
Connect to Cedar or Graham with the -X/-Y flag for X11-forwarding. You can start your graphical application on the login node (small visualizations)
 
  module load vmd
  vmd
 
or you can request interactive resources on a compute node (large visualizations)
 
  salloc --time=1:00:0 --ntasks=1 --mem=3500 --account=def-someprof --x11
 
: and, once the job is running, start your graphical application inside the job
 
  module load vmd
  vmd
 
</tab>
<tab name="Niagara">


Since runtime is limited on the login nodes, you might want to request a testing job in order to have more time for exploring and visualizing your data. On the plus side, you will have access to 40 cores on each of the nodes requested. For performing an interactive visualization session in this way please follow these steps:
Since runtime is limited on the login nodes, you might want to request a testing job in order to have more time for exploring and visualizing your data. On the plus side, you will have access to 40 cores on each of the nodes requested. For performing an interactive visualization session in this way please follow these steps:
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<li> exit the debug session.
<li> exit the debug session.
</ol>
</ol>
</tab>
</tabs>


=== Start a remote desktop via VNC === <!--T:92-->
=== Start a remote desktop via VNC === <!--T:92-->
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