Summary

Organizations have extremely high expectations for their mission-critical Web-enabled applications. They not only expect them to be up and running 24/7, but they also expect them to be scalable and transparently meet growing end- user demands. Meeting these requirements by leveraging larger, more powerful server machines is not only an expensive proposition, but can also be a short-lived solution that is prone to exhibiting signs of failure in the long term .

This chapter introduced the WebLogic cluster, which in conjunction with a load-balancing solution, is a far more cost-effective , flexible, and reliable solution for meeting the demands of highly available and scalable J2EE applications. You have not only learned how to intelligently discuss high availability and scalability in the context of your J2EE solutions, but also how to implement clustering solutions using the WebLogic cluster.