Introduction#
From the menu Interactive Apps, it is possible to start a given application and use it for interactive work. Some applications have already predefined settings, like the partition and allow only to adjust the wall time. As an example, the _Grex Desktop Simplified _ thar uses by default the test partition.
To start an application, click on the name of the application, then fill the required parameters for slurm (accounting group, partition name, number of cpus, wall time, …).
Most of the applications require to set up one of the following parameters:
- Slurm accounting group: if you have access to one accounting group (def-professor), the scheduler will pick it by default. If you have more than one accounting group, you need to specify the accounting group to use.
- Wall time: crrently, there is a limit of 6 hours for most of the applications.
Here, we will discuss the usage of the Desktops: Grex Desktop Simplified and Grex Desktop.
Grex Desktop Simplified#
This is a very simplified instance of a Desktop. It requires only to setup the accounting group (def-professor), the wall time and if needed add the email notifications. The following snapshot shows an example of settings:
Once all the fields are filled, you can lauch the application using the Launch button. This will submit a job to compute node (in this case, it will run on the test partition). First, it goes to the queue and start when the resources are available:
And once the resources are available, the interactive app will show up as running:
At this point, you may want to decrease the compression and image quality for not having a slow application.
Then, click on the buttom Launch Grex Desktop Simplified to start the application. After starting the Desktop, you will have access to your files and a terminal. In the following snapshot, it shows a terminal where we loaded matlab module and started matlab interface. Note that there is a dedicated application for matlab that you can use. We are loading matlab here to show how the desktop looks like. The Desktop can be used to start any other program that uses GUI.
