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One of the available methods of accessing NXCALS data is through a SWAN notebook session.

How to create a SWAN session

Note

Please note that currently, user can open maximum of two Spark connections (to the same cluster) for each SWAN session.

In other words, you can open a second notebook in the same SWAN session having a second SparkContext. Creation of third connection within the same session it will not work. This restriction could be removed if necessary at a later stage.

  1. Log in with your CERN NICE credentials at: https://swan.cern.ch/
  2. Provide the following information:

    • Software stack: NXCals Python3 (to ensure the latest NXCALS libraries)
    • Platform: use proposed value proposed
    • Number of cores: select required
    • Memory: select required
    • Spark cluster: BE NXCALS (NXCals)

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  3. From a list of Projects select a notebook to work with or create a new one. At this point, one can notice that the platform provides a possibility to upload to / download from that directory and to share notebooks with others.

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  4. Authenticate using NICE credentials by clicking on STAR button in the navigation bar (that action will establish Spark clusters connection). Ensure that the " Include NXCALS options" check-box is enabled. With the NXCALS options in place, the "Selected configuration" region, immediately displays all the configuration that would be applied on the Spark session creation.

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  5. Execute content of cells

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