I worked on a project that needed load-balancing for JForum -
http://globovox.globo.com (GloboVox, a very customized JForum installation).
It is running under multiple
Tomcat instances, with Apache's HTTPD on front of it, and a load balancing hardware.
Comunication between the JForum's were made using JBossCache, and it worked very well.
The core JForum distribution in the CVS has the code for JBossCache (which I don't send in regular releases yet), but I haven't heard many people using it so far, so a lot of
testing is needed - which, of course, is always necessary when the site you're planing to build requires load balancing.
Rafael
[originally posted on jforum.net by Rafael Steil]