The LUMI web interface¶
The web interface for LUMI at www.lumi.csc.fi can be used to access the supercomputer using only a web browser.
Features available in the web interface:
- View, download and upload files
- Open a shell on the login node
- Open a persistent shell on a compute node
- View running batch jobs
- Launch interactive apps and connect to them directly from the browser:
- Desktop with support for GPU acceleration
- Jupyter for courses: An interactive Jupyter session specifically for courses
- Visual Studio Code
The web interface is still under development so expect additional features and further polishing.
See the section in First steps for how to connect to LUMI using the web interface.
After connecting, you can browse your files on the supercomputer, start a shell, view running jobs or start one of the many available applications. The dashboard also contains some important system information.
The shell apps can be found under Pinned apps or on the top navbar under the Tools section. There are two different shells.
The Login node shell launches a normal Linux shell on one of the login nodes. Any command that is running when the login shell browser tab is closed will stop. Note that the same rules apply here as during a normal ssh session from a terminal. Login nodes are only for light pre/postprocessing.
The Compute node shell launches a persistent shell on a compute node for heavier commands that should not be run on login nodes. The persistent shell will keep running even if you close your browser or lose internet connection.
The file browser can be opened using the Files section on the top navbar (this displays a list of all project disk areas), or using the shortcut to the home folder on the front page. In the file browser you can upload/download files, create new files and directories, or open a shell in the current directory.
Uploaded files will overwrite existing files with the same name without prompting. Currently the maximum size for individual file uploads is 10GB
Clicking on a file will open it in a view-only mode. For more options like editing, renaming and deleting, use the button with three dots next to the filename.
The file browser comes with a basic text editor. Some important notes on that:
- If no changes have been made, the save button is grayed out.
- There is no save-as feature, so read-only files can not be edited.
LUMI-O can also be accessed if you have configured the connection using the lumio-conf tool. After running the configuration tool, you may need to restart the web server using the Restart the webserver link in the Help menu in the top navbar. Shortcuts to the project storage spaces in LUMI-O that have valid authentication credentials will be visible in the file browser.
The Active Jobs app can be found under the Jobs section in the top navbar. In the app you will be able to see your currently running and recently completed Slurm jobs. By expanding the row for the job using the arrow on the left side more details about the job will be visible.
For instructions on how interactive applications work, see the generic instructions on interactive applications, or the applications specific instructions: