Using MySQL for Hive metastore

The preceding configuration is the embedded mode configuration, which is not production ready and should not be used.

Now, we will enable the metastore to connect to an external MySQL database and scale to multiple connections. This will be the local metastore mode.

The assumption here is that the readers know the basics of MySQL user management and can assign grants.

How to do it…

1. Clean up the old databases by either dropping from Hive or simply cleaning the warehouse location. Note: this should never be done in production. This is shown in the following screenshot:

   

2. Now, firstly, we need to install the MySQL server on any node in the cluster or outside the Hadoop cluster. In our case, we will install it on the master node master1.cyrus.com:

   # yum install mysql-server –y
   # /etc/init.d/mysqld start
   # chkconfigmysql on

3. Make sure that the firewall on the master node allows the connection to port 3306 from the Edge node in the cluster. It is better to allow it to connect...