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# FAQ

## There are so many DataObjects / Actions, how do I get started?

Common use cases are included in the sdl-examples project, check out its application.conf. This should give you a good overview of how to use data objects and actions. Then check the Reference to see which types of data objects and actions are currently supported.

## How can I test Hadoop / HDFS locally ?

When using local:// URIs, file permissions on Windows, or certain actions, local Hadoop binaries are required.

2. Extract the contents of the Hadoop distribution archive to a location of your choice, e.g., /path/to/hadoop (Unix) or C:\path\to\hadoop (Windows).
3. Set the environment variable HADOOP_HOME=/path/to/hadoop (Unix) or HADOOP_HOME=C:\path\to\hadoop (Windows).
4. Windows only: Download a Hadoop winutils distribution corresponding to your Hadoop version from https://github.com/steveloughran/winutils (for newer Hadoop releases at: https://github.com/cdarlint/winutils) and extract the contents to %HADOOP_HOME%\bin.