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From Sean Owen <>
Subject Re: Memory and Speed Questions for Item-Based-Recommender
Date Mon, 13 Jul 2009 09:52:18 GMT
PS I checked in MySQLJDBCItemSimilarity which would let you store and
read these from a database. At least that solves the memory issue. You
can still put a caching wrapper on top of it too.

On Mon, Jul 13, 2009 at 9:36 AM, Sean Owen<> wrote:
> How does Lucene go from item-item links to recommendations? I'm
> missing where the notion of user ratings, or even users, come into
> play, or the strength of the association.
> If the issue is really just storing the item-item links efficiently in
> a way that isn't in memory, how about I cook up a JDBC-based
> implementation? Seem more direct.

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