title: How do I set up a Tomcat configuration for multiple Oracle databases with persistent connections?
body: <p>I have 3 separate LINUX servers each containing an Oracle database with one standalone Tomcat web server running on a fourth LINUX server.<br>
  Data from different sources on different networks is being written into each OracleDB.</p>
  
  <p>What is the best practice or method to configure Tomcat for connectivity to each of these databases?
  A persistant connection to all three is needed to initiate SQL queries and joins between each database as needed using from jstl / beans and jsp.  </p>
  
  <p>I saw some configuration examples using WEB-INF/web.xml and server.xml but didn’t see anything specifically addressing multiple database connections configured simular to this setup.  </p>
  
  <p>If someone has an example of a Tomcat configuration that addresses this type of connectivity or if there are article examples or pointers would be very helpful. </p>