JupyterHub¶

Access Jupyter notebooks through the web interface for interactive Python analysis.

Access URL¶

https://jupyter.sdcc.bnl.gov/

Features¶

• Web-based interface - No local software installation required
• Multiple kernels - Python and custom environments
• Persistent sessions - Work is automatically saved
• File management - Upload, download, and organize notebooks

Setting Up Belle II (Basf2) Kernel¶

1. Create Kernel Directory¶

mkdir -p ~/.local/share/jupyter/kernels/belle2_light-2503-ceres/

2. Create Kernel Configuration¶

Create a file kernel.json in the directory above:

{
    "display_name": "Belle2 (light-2503-ceres)",
    "language": "python",
    "argv": [
        "/cvmfs/belle.cern.ch/tools/b2execute",
        "-x",
        "python3",
        "light-2503-ceres",
        "-m",
        "ipykernel_launcher",
        "-f",
        "{connection_file}"
    ]
}

3. Verify Installation¶

After setup, the kernel Belle2 (light-2503-ceres) will appear in the kernel selection dropdown at jupyter.sdcc.bnl.gov.

Storage Access¶

From Jupyter notebooks, you can access:

• Home directory: Default working location
• Scratch space: /gpfs/mnt/atlasgpfs01/belle2/users/USERNAME

But you can NOT access:

• dCache storage: /pnfs/sdcc.bnl.gov/users/USERNAME

It requires special handling to access dCache files (in preparation).