> 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/pdi-transformation-steps-reference-overview/mongodb-input/options-mongodb-input/input-options-tab.md).

# Input options tab

![Input options tab in Mongo Input](/files/WnvwGOFCZC1Hg4jg4R5j)

In the **Input options** tab, specify which database and collection you want to retrieve information from. You can also indicate the read preferences and tag sets.

Enter the following information in the **Input options** fields:

| Option              | Definition                                                                                                                                            |
| ------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Database**        | Name of the database to retrieve data from. Click Get **DBs** to populate the drop-down menu with a list of databases on the server.                  |
| **Collection**      | Name of the collection to retrieve data from. Click **Get collections**to populate the drop-down menu with a list of collections within the database. |
| **Read preference** | Specify which node to read first: **primary**,**primary preferred**, **secondary**, **secondary preferred**, or **nearest**.                          |


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