Is MongoDB a valid alternative to relational db + lucene?

Question

On a new project I need a hard use of lucene for a searcher implementation. This searcher will be a very important (and big) piece of the project. Is valid or convenient replaci

Answer 1

Another option is to use elasticsearch (backed in lucene) width couchdb: http://www.elasticsearch.org/blog/2010/09/28/the_river_searchable_couchdb.html