6. Tomcat Clustering Model Load Balancing Front-end (many choices of technology) Tomcat server instance 1 Tomcat server instance 2 Tomcat server instance N State/Session Sharing Back-end (many choices of technology) Incoming requests
7. Tomcat Load Balancing Apache ---------------- mod_jk2 Incoming requests Coyote AJP ---------------- Tomcat1 Overloaded Tomcat server Apache ---------------- mod_jk2 Incoming requests Coyote AJP ---------------- Tomcat2 Coyote AJP ---------------- Tomcat3 Coyote AJP ---------------- Tomcat1 Load balanced cluster Mod_jk2: Apache module provides integration between Apache web server and Tomcat. Coyote AJP: Provides communication channel between Apache and the running instances of Tomcat.
![Tomcat Clustering ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)