# Creating a MongoDB source node
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## Prerequisites needed
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+ A AWS Glue MongoDB connection, as described in the previous section, [Creating a MongoDB connection](creating-mongodb-connection.md).
+ If you chose to create an Secrets Manager secret, appropriate permissions on your job to read the secret used by the connection.
+ A MongoDB collection you would like to read from. You will need identification information for the collection.

  A MongoDB collection is identified by a database name and a collection name, *mongodbName*, *mongodbCollection*.

## Adding a MongoDB data source
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**To add a **Data source – MongoDB** node:**

1.  Choose the connection for your MongoDB data source. Since you have created it, it should be available in the dropdown. If you need to create a connection, choose **Create MongoDB connection**. For more information see the previous section, [Creating a MongoDB connection](creating-mongodb-connection.md). 

    Once you have chosen a connection, you can view the connection properties by clicking **View properties**. 

1. Choose a **Database**. Enter *mongodbName*.

1. Choose a **Collection**. Enter *mongodbCollection*.

1. Choose your **Partitioner**, **Partition size (MB)** and **Partition key**. For more information about partition parameters, see ["connectionType": "mongodb" as source](aws-glue-programming-etl-connect-mongodb-home.md#etl-connect-mongodb-as-source).

1.  In **Custom MongoDB properties**, enter parameters and values as needed.