VNC: Difference between revisions

VNC (view source)

Revision as of 15:09, 9 July 2024

65 bytes removed , 3 months ago

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Rdickson

Bureaucrats, cc_docs_admin, cc_staff

2,879

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 Now you need a VNC server to connect to.  This can be either a persistent vncserver running on dedicated VDI nodes which are part of [[Graham]], or a temporary vncserver you start on a cluster compute node.  VNC is not a heavyweight server, so you can certainly run lightweight sessions on cluster login nodes.
-== VDI nodes == <!--T:30-->
+== Virtual Desktop Infrastructure (VDI) nodes == <!--T:30-->
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-Graham has dedicated VDI nodes collectively known as gra-vdi.  These nodes provide a full graphical desktop, accelerated OpenGL, and shared  access to Graham's <code>/home, /project,</code> and <code>/scratch</code> filesystems.
+Graham has dedicated VDI nodes collectively known as gra-vdi.  These nodes provide a full graphical desktop, accelerated OpenGL, and shared access to Graham's <code>/home, /project,</code> and <code>/scratch</code> filesystems.
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-As an aside, to connect to either machine directly you could instead enter <code>VNC server: '''gra-vdi3.sharcnet.ca'''</code> or enter <code>VNC server: '''gra-vdi4.sharcnet.ca'''</code>.  This could be useful if either server is under a heavy load and your planning to run some intensive calculations or you want to use your local $SCRATCH directory on either server (which points to /local/tmp/$USER on each machine).  This is notably different than the clusters where $SCRATCH points to the shared directory /scratch/$USER location on all compute and login nodes.  Similar to the clusters however any data left under $SCRATCH on gra-vdi will eventually be deleted since the disc space is limited as it is fast.
+You also have the option to connect to either machine directly by entering <code>VNC server: '''gra-vdi3.sharcnet.ca'''</code> or enter <code>VNC server: '''gra-vdi4.sharcnet.ca'''</code>.  You might choose to do this if you find one machine is responding poorly due to heavy load, or if you want to use your local $SCRATCH directory on either server.  $SCRATCH points to /local/tmp/$USER on each machine.  This is notably different than the clusters where $SCRATCH points to the shared directory /scratch/$USER location on all compute and login nodes.  Similar to the clusters, however, any data left under $SCRATCH on gra-vdi will eventually be deleted since the disc space is limited.
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-As with regular login nodes, the VDI nodes are a shared resource and not intended for doing batch computation (that is what the compute nodes are for) so please only use them for graphics-related tasks.  For example graphical pre-processing such as mesh generation, graphical post-processing such as visualization, or graphical integrated development environments.
+As with regular login nodes, the VDI nodes are a shared resource and not intended for doing batch computation. That is what the compute nodes are for.  Please only use them for graphics-related tasks, such as mesh generation, visualization, or using an integrated development environment (IDE).
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