Searching Lucene Index built using Hadoop

I'm trying to index a large dataset using Hadoop+Lucene. I used the example under hadoop/trunk/src/conrib/index/ for indexing. I'm unable to find a way to search the index that was successfully built.

I tried copying over the index to one machine and merging them using IndexWriter.addIndexesNoOptimize().

I would like hear your input on the best way to index+search large datasets.

Thanks,
Saranath