I am looking at moving from my current app server to Jboss. We would be looking at a cluster size of about 80 app servers (new dual proc Sun machines), two instances each, so 160 jboss instances.
Each instance would be supporting 750 sessions.
Has anyone taken JBoss clustering to this level before?
No, we haven't. The largest JBoss cluster known is 20-32 nodes.
Because this is a first, I would offer you *free* collaboration for fixing issues arising from this.
If you're interested, email me: bela at jboss dot com.
P.S.: I'm the guy who developed JGroups