Connect to HDFS Data in Aqua Data Studio

The CData JDBC Driver for HDFS integrates HDFS data with wizards and analytics in IDEs like Aqua Data Studio. This article shows how to connect to HDFS data through the connection manager and execute queries.

Create a JDBC Data Source

You can use the connection manager to define connection properties and save them in a new JDBC data source. The HDFS data source can then be accessed from Aqua Data Studio tools.

1. In Aqua Data Studio, select Register Server from the Servers menu.
2. In the Register Server form, select the 'Generic - JDBC' connection.
3. Enter the following JDBC connection properties:
   • Name: Enter a name for the data source; for example, HDFS.
   • Driver Location: Click the Browse button and select the cdata.jdbc.hdfs.jar file, located in the lib subfolder of the installation directory.
   • Driver: Enter the Driver's class name, cdata.jdbc.hdfs.HDFSDriver.

   • URL: Enter the JDBC URL, which starts with jdbc:hdfs: and is followed by a semicolon-separated list of connection properties.

     In order to authenticate, set the following connection properties:

     • Host: Set this value to the host of your HDFS installation.
     • Port: Set this value to the port of your HDFS installation. Default port: 50070

     Built-in Connection String Designer

     For assistance in constructing the JDBC URL, use the connection string designer built into the HDFS JDBC Driver. Either double-click the JAR file or execute the jar file from the command-line.

     java -jar cdata.jdbc.hdfs.jar

     Fill in the connection properties and copy the connection string to the clipboard.

     A typical JDBC URL is below:
     jdbc:hdfs:Host=sandbox-hdp.hortonworks.com;Port=50070;Path=/user/root;User=root;

Query HDFS Data

You can now query the tables exposed.