> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/advanced-topics-pentaho-data-integration-overview/partitioning-data/get-started.md).

# Get started

By default, each step in a transformation is executed in parallel in a single separate thread. Consider, for example, the transformation below. With a single copy of each step, the data is read from the CSV file input step and then aggregated in the `count by state` step. The results of which can be verified by examining the preview data.

![Partitioning use case example](/files/jIqIiU1T2h6yS5AJ1ZUt)


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