In reference to an article focusing on Clustering Scala Actors in Terracota by Jonas Boner. Bloggers Lalit Pant and Martin Elwin provide their own posts, implementation and commentary on the subject.
In case you're not familiar with Scala Actors themselves, you can find an introduction to the subject at:
Lalit Pant's post on Clustering Scala Actors:
Martin Elwin's post on Clustering Scala Actors:
Jonas Boner original post on Clustering Scala Actors with Terracotta