Consider these claims
Currently we are having a fairly simple app (jsp, servlets, oracle db on an oracle raq cluster, application uses a few simple tables) running on two high end servers fronted by a loadbalancer. Presently there is no session replication across the servers. Apache httpd handles the ssl encryption/decryption and uses AJP13 to talk to a tomcat instance on each server. This config is ok for most of the time except when there are huge surges (maybe 5 times a year) in which case we have to present a slimmed down version of the site.
Will moving to JBOSS (and dropping apache for SSL) give us twice the performance as claimed? What are the potential pitfalls/advantages (gotchas)?
The OS is RHEL but we do not want to commit to this config long term (if there are special binaries involved).
I have also heard about Terracotta recently and if you have an opinion thats also welcome (although note that presently we dont cluster sessions at all as that would further reduce capacity of the servers)
p.s. In a weird twist of fate, Experts Exchange was restarting its servers as I posted this question.. Luckily I had pasted it into notepad2!