# 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/7QGoofh9epDDfo2fM0S5)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.pentaho.com/pdia-data-integration/10.2-data-integration/advanced-topics-pentaho-data-integration-overview/partitioning-data/get-started.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.