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From mark harwood <markharw...@yahoo.co.uk>
Subject Re: Speed of grouped queries
Date Wed, 03 Jan 2007 15:05:55 GMT
While we're talking movies etc - did anyone else have a stab at the Netflix prize using Lucene?
 ( http://www.netflixprize.com/  )

I did get onto the leaderboard (briefly) using a Lucene-based solution which involved loading
all 100 million movie reviews into a single RAMDirectory for fast processing/analysis. I found
the user/movie rating matrix could be represented in a very compact form by (ab)using Lucene
position info for rating values.




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