Looking at the roadmap there’‘s an Enterprise version ‘‘future’’ entry to support clustering. I see there’'s a related issue (ENT-43) currently targeted for 3.4 and a bit of recent SVN activity.
Looking at the threads, people seem to be wanting the ‘‘clustering’’ feature to solve one of two problems:
High Availability: transparent fail-over to a hot standby server.
Load Balancing: horizontal scaling to support more users in a single domain.
Clearly there is a lot of overlap on these two things: load balanced clusters often - but not always - support transparent fail-over.
So my question is: What scenario is the clustering work targeted at solving (first ;-)? HA? Load balancing? Both?
p.s. My first post to the forums, so I feel I ought to say what a great piece of software Openfire is and that the forum post-editing thing is a real pleasure to use!