From: Mauricio Nuņez >What is the status of the load balancing ajp13 on TC 4.0.1 ?
As far as I can tell, you should use mod_jk and ajp1.3. mod_webapp doesn't do load balancing or any sort of redundancy yet. If security is important, tomcat4.0.1 seems to have some less ajp security features (such as allow connections only from these addresses) than jserv, but the features are relatively minor and the performance difference is signifigant (mod_jk is signifigantly faster). But that should only affect you if you're serving hundreds of servlets per second. - Kevin Wang