Hi, Lucandra stores a lucene index on cassandra: http://blog.sematext.com/2010/02/09/lucandra-a-cassandra-based-lucene-backend
As the author of lucandra writes: "I’m sure something similar could be built on hbase." So here it is: http://github.com/thkoch2001/lucehbase This is only a first prototype which has not been tested on anything real yet. But if you're interested, please join me to get it production ready! I propose to keep this thread on hbase-user and java-dev only. Would it make sense to aim this project to become an hbase contrib? Or a lucene contrib? Best regards, Thomas Koch, http://www.koch.ro