Jupyter (Open OnDemand)

Launching Jupyter Notebooks via Open OnDemand

This guide provides step-by-step instructions for launching interactive Jupyter Notebook / JupyterLab sessions on the High-Performance Computing (HPC) cluster using the Open OnDemand web portal.

Prerequisites

• An active HPC Zurada account.

• A connection to the UofL network or the *UofL Cisco AnyConnect VPN (if off-campus).

Step 1: Access Open OnDemand

1. Open your browser and navigate to the Open OnDemand portal at https://web.rc.louisville.edu

Figure 1: Open OnDemand authentication screen.

Step 2: Navigate to Jupyter Application

1. On the top navigation bar, click on Interactive Apps.

2. Select Jupyter Notebook (or JupyterLab) from the drop-down menu.

Figure 2: Selecting Jupyter Notebook from the Interactive Apps menu.

Step 3: Configure Job Options

Fill in the form parameters according to your resource requirements:

Form Parameters

Parameter	Description
Job Name	A custom identifier for your session (e.g., jupyter_analysis).
Project / Account	Your Ulink id.
Partition	Choose the compute partition.
Number of Hours	Total runtime requested for the interactive session.
Number of Cores	Number of CPU cores requested for computation.
Working Directory	Starting directory for your Jupyter workspace. Defaults to /work/$USER.

Figure 3: Interactive session submission form.

Click the Launch button at the bottom of the page.

Step 4: Connect to the Running Session

1. After clicking Launch, you will be redirected to the Interactive Sessions card view.

2. The session card will initially display Queued or Starting.

3. Once resources are allocated, the status will change to Running.

4. Click the blue Connect to Jupyter button to open the notebook environment in a new tab.

Figure 4: Active session card displaying the “Connect to Jupyter” button.

Step 5: Terminate the Session

When you have finished your work, close your interactive session to release compute resources for other users:

1. Return to the Open OnDemand Interactive Sessions page.

2. Click the red Delete button on the session card.

Figure 5: Deleting an active interactive session.

Troubleshooting

• Session Fails to Submit: Verify that your account has authorization for the selected partition (especially high-memory options like cpu1500g).

• Connection Timeout: Ensure your browser is not blocking pop-up windows from the portal URL.