News From Sun: Availability Modeling for the Sun ONE Application Server 7
This paper presents an availability analysis for multitier, Java(tm) and Web-based application deployments running on the Sun(tm) ONE Application Server 7, Enterprise Edition software. The results show that this software is able to support 99.999-percent application availability in common Web deployment.
http://java.sun.com/docs/performance/AS7-EE-5-Nines-HA-Evidence.pdf