Exporting data from HDFS to RDBMS
In the previous recipe, we spoke about how to import data from MySQL to HDFS. Now it is time to see how to export data from HDFS to RDBMS using Sqoop. Generally, this is required when you want to keep processed data in RDBMS to be used by some reporting tools.
Getting ready
To perform this recipe, you should have a Hadoop cluster running with you as well as the latest version of Sqoop installed on it. Here I am using Sqoop 1.4.6. We would also need the MySQL database to be present in the network. Installing Sqoop is easy; by downloading Sqoop tar ball and setting it in system path. As we are going to import data from MySQL, we would also need to download MySQL connector. Based on your MySQL version, download the right connector jar and copy it into the lib directory of Sqoop installation.
How to do it...
In the previous recipe, we imported data from MySQL into HDFS. Now we are going to export this data back to some different MySQL table.
To do this, first we...
