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    Setting the Expiration Policy for Reflections

    Rather than delete a reflection manually, you can specify how long you want Dremio to retain the reflection before deleting it automatically.

    The changes take effect immediately.

    Procedures

    To set the expiration policy for all reflections derived from physical datasets in a data source:

    1. Right-click a data lake or external source.
    2. Select Edit Details.
    3. In the sidebar of the Edit Source window, click Reflection Refresh.
    4. After making your changes, click Save.

    To set the expiration policy on reflections derived from a particular physical dataset:

    note:

    The physical dataset must be based on more than one file.

    1. Locate a physical dataset.
    2. Click the gear icon to its right.
    3. In the sidebar of the Dataset Settings window, click Reflection Refresh.
    4. After making your changes, click Save.