Open OnDemand, which is an NSF-funded open-source HPC portal, is available for users and provides web browser access for interfacing with HPC. This service is available from https://ood.hpc.arizona.edu/
The file browser provides easy access to your /home, /xdisk, and /groups directories and allows you to view, edit, copy, and rename your files. You may also transfer small files between HPC and your local workstation using this interface. For larger transfers, see our section on Transferring Data for more efficient methods.
Job Viewer and Job Composer
The Job Viewer allows you to check the status and time remaining of your running jobs. You can also cancel your jobs using this interface. Note: be careful looking at All Jobs since this will likely timeout trying to organize them all.
The Job Composer lets you create and run a SLURM script on any of our three clusters. It should be noted that the Job Composer creates a special string of directories in your /home starting with ondemand/ which is where both your submission scripts and output files will be stored. Make note of the path to your files on the right-hand side of the Job Composer screen under Script location.
Command Line Access
Need command line access to a terminal on HPC? No problem! Simply select the Clusters dropdown menu to connect to one of HPC's login nodes.
When selecting a job queue for any interactive applications, we recommend against using windfall. These jobs/sessions can be preempted at any time and your progress will be lost.
If you need a GPU, then add "gpu" to the Special Options field
Interactive Virtual Desktops
One nice feature of Open OnDemand is the ability to interact with HPC using a virtual Desktop environment. This provides a user-friendly way to run applications, perform file management, and navigate through your directories as though you were working with a local computer. Additionally, it eliminates the need to use X11 forwarding when working with GUI applications allowing an easy way to interact with software such as Matlab, VisIt, or Anaconda.
The Jupyter Notebook is an open-source web application that allows you to create and share documents that contain live code, equations, visualizations, and narrative text.
When you start a Jupyter notebook, by default your working directory will be your home. If you would like to change this so that your session starts in a different location, you'll need to add a line to the hidden file ~/.bashrc in your home. To do this, open your ~/.bashrc in a text editor and add the following, substituting your desired path in for /path/to/directory:
Various Kernels are available to use through this OOD Application including Python, R, and Bash.
Additionally, you have the ability to create your own python kernels to control python version and provide access to your own custom environments.
You can also create kernels to enable access to other software applications. For example, if you want to add a kernel for Julia, you can log into an interactive terminal session and use the Julia module to add IJulia. When you log into your next Jupyter session, you should see the kernel in the "new" dropdown menu:
RStudio is an integrated development environment (IDE) for R. It includes a console, syntax-highlighting editor that supports direct code execution, as well as tools for plotting, history, debugging and workspace management. For an overview of the RStudio IDE, see: https://www.rstudio.com/products/RStudio/. Additionally, practice examples are available from https://www.rstudio.com/products/RStudio/.
For information on using R on HPC, see our online documentation on Using and Customizing R Packages.
A GUI for multiple versions of Matlab is available.
Anaconda is available as a module and can be accessed through an interactive terminal session using the standard module commands. Some information on creating custom conda environments can be found in our Using and Installing Python documentation.
Anaconda also comes with a graphical interface which is best accessed through a virtual desktop (see earlier section). To access the GUI, start an interactive desktop session, open the terminal, then:
This will bring up:
You can launch Glueviz, JupyterLab, Jupyter Notebook and Spyder from here. To launch Orange or RStudio, you have to change the dropdown next to "Applications on".
You may find this Guide to Anaconda an interesting read.