TerraCotta cluster Lucene

[karl wettin]

Some people might find this interesting. I have personally not looked  
at it in depth:

Engineers at TerraCotta have detailed a new way to cluster lucene,  
the popular text search library from Apache. Their method involves  
implementing the lucene RAMDirectory interface and using TerraCotta  
DSO to share the RAMDirectory across JVMs.

http://www.infoq.com/news/2006/11/clustering-lucene-terracotta