# Hadoop cluster

You'll need to know this information about your Hadoop Cluster. You can get these things from your Hadoop administrator or the Hadoop Cluster Management tool.

* Installed version
* Hostname and IP address for each cluster node, including Yarn servers
* If your cluster is enabled for High Availability, you will also need the name of the nameservice, (DNS lookup table)


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# 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/install/9.3-install/use-hadoop-with-pentaho/get-started-with-hadoop-and-pdi/before-you-begin-get-started-with-hadoop-and-pdi/hadoop-connection-and-access-information-list/hadoop-cluster-hadoop-connection-and-access-information-list.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.