[GeoNetwork-users] Geonetwork clusters?

Can anyone point me to documentation or discussion about running Geonetwork "clustered"? I work with a group that has multiple instances of Geonetwork sharing the exact same configuration files (and indices as well).

I noticed some time back there was concern this doesn't work:

http://n2.nabble.com/Re-Agenda-for-GeoNetwork-hacking-in-Bolsena-release-planning-SEC-UNCLASSIFIED-tp2020037p2020037.html

But I haven't found recent discussion.

Apologies if this has already been covered elsewhere. I've googled and search the manual, but I may not be searching the right term.

Ron Bentley