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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. | 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 | 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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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 | 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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