Tomcat clutster

http://www.tutorialspoint.com/white-papers/load-balancing-and-scalability-via-tomcat-clusters.htm

http://www.codeproject.com/Tips/716338/How-to-Setup-a-Tomcat-Cluster-in-5-Minutes

http://www.codeproject.com/Articles/712380/Deploying-Tomcat-Grails-Apps-to-Cluster-with-Bear