title: Intersect search results of multiple indexes Lucene efficently
body: <p>I have two Lucene indexes (version 3.5.0), on which I am going to write with Hibernate Search. I need to implement a search that returns a result that is the intersection (AND) of the results on the individual indexes. The main problem is that both the individual results and the final result can be very large, so the combination should be efficient.
  Is there an efficient way to do this? Can the <a href="http://lucene.apache.org/core/3_6_0/api/all/org/apache/lucene/index/MultiReader.html" rel="nofollow">MultiReader</a> help me?</p>