Book Image

Apache Tomcat 7 Essentials

By : Tanuj Khare
Book Image

Apache Tomcat 7 Essentials

By: Tanuj Khare

Overview of this book

Apache Tomcat (or simply Tomcat) is an open source servlet container developed by the Apache Software Foundation (ASF). The latest major stable release, Apache Tomcat version 7 implements the Servlet 3 and JavaServer Pages 2 specifications from the Java Community Process, and includes many additional features that make it a useful platform for developing and deploying web applications and web services.Apache Tomcat 7 Essentials follows a practical approach to teach installing, configuring, and maintaining Tomcat. It helps you to understand the middle architecture for hosting multiple websites and also provides the confidence to implement middleware support. It imparts to you the capacity to resolve migration issues and also provides regular maintenance solutions. This is the first and only book to cover upgrading to Tomcat 7 from previous versions.The journey of the reader starts at the beginner level and ends at the expert level. The content is designed in such a way that it balances the theory and practical approach for understanding concepts related to handling middle ware and web issues.In this book, you will go through a three-phase life cycle. The first cycle consists of installation, configuration of Tomcat 7 on different OS, and other configurations related to JDBC, port, deployment etc. The second phase deals with the building of enterprise application setup and high availability architecture (clustering load balancing). The third and critical phase will teach you to handle critical issues, performance tuning, and best practices for various environment stacks like dev/QA/stage/production.This book gives you a wider vision of using Tomcat 7 in web technologies and the skill to optimize their performance using Apache Tomcat 7.
Table of Contents (18 chapters)
Apache Tomcat 7 Essentials
About the Author
About the Reviewers

Horizontal clustering in Apache Tomcat 7

For horizontal clustering, we have to configure at least two instances of Apache Tomcat on two different physical or virtual systems. These physical machines can be on the same physical network. It also helps in providing a high-speed bandwidth to the system.


If you want to configure clustering on different networks, then you have to open the firewall between the two networks for the AJP port and the clustering port.

There are prerequisites for configuring horizontal clustering. The following are the details:

  • Time sync between the two servers

  • Proper network connectivity between the two servers

  • Firewall ports between the two servers (if you are connecting from a different network)

In order to configure horizontal clustering, you have to perform the following steps:

  1. 1. Installation of the Tomcat instance

  2. 2. Configuration of the cluster

  3. 3. Apache HTTP web server configuration for the horizontal cluster

Installation of the Tomcat instance

We have already...