Trino HDFS

HDFS (Hadoop Distributed File System). Trino, formerly known as Presto, is a distributed SQL query engine designed to query large data sets distributed over one or more heterogeneous data sources, including HDFS.

With the Trino HDFS connector, you can read data from and write data to HDFS. This allows you to leverage Trino’s powerful SQL syntax to query data stored within a Hadoop cluster.

Here’s a basic example of how to set up the HDFS connector:

1. Add the HDFS Connector JAR: First, you must ensure that the HDFS connector JAR is available in your Trino installation.

2. Create a Configuration File: In the Trino configuration directory, create a new catalog configuration file for HDFS, such as etc/catalog/hdfs.properties.

3. Edit the Configuration File: You may need to edit the file to suit your particular setup. A basic configuration might look something like this:

   propertiesCopy code

   connector.name=hadoop-hdfs
hdfs.authentication.type=NONE
hdfs.uri=hdfs://your-namenode-address:port


   Modify the above parameters to match your specific Hadoop cluster setup.

4. Restart Trino: After editing the configuration, restart Trino to load the new connector.

5. Query HDFS Data: Once the HDFS connector is configured, you can start querying data stored in HDFS using Trino’s SQL syntax.

Remember to consult Trino’s official documentation for detailed information on configuring and using the HDFS connector, as the exact configuration might vary based on your Hadoop version and setup.