Kedar has a blog on GlassFish cluster administration (domain, DAS, Node Agents, Instances, ...). This should come handy to people looking at understanding when synchronisation actually happen with the DAS (Domain Administration Server) which is where the centralized repository sits. We often claim to have BEA's features at JBoss' price. This centralized cluster management is certainly one such feature.

GlassFish Domains are AppServer engines that can be administered separatedly. Kedar (the GF administration lead) has a complete introduction here but Filippo just posted a focused and much shorter Cheatsheet that you may find very useful. Check it out! Filippo is the driver behind the Milano JUG and has been using GlassFish for quite a while as you can see if you do a Search in TheAquarium. Also see his latest repost on GlassFish and Eclipse.

GlassFish V2 is adding the remaining Enterprise-Quality features into the Open Source Project GlassFish. For Milestone 2 that means improved clustering installation and administration, and these revolve around the concept of a Domain. Two good overviews of Domains are Shreedhar's recent entry and Kedar's earlier blog. More TA entries on the subject are here. Cluster installation has also been incorporated into the quickstart guide. Finally, the GlassFish V2 Architecture Page has more details.