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From Ted Dunning <>
Subject Re: Memory and Speed Questions for Item-Based-Recommender
Date Fri, 10 Jul 2009 18:35:22 GMT
Storing the item-item links in Lucene and forming a query with recent
history is a pretty easy way to get real-time recommendations.  This can
also get rid of the cache because standard measures applied to make Lucene
fast will work on this.

On Fri, Jul 10, 2009 at 5:34 AM, Sean Owen <> wrote:

> Also, it sounds like you are trying to do real-time recommendations,
> like synchronously with a user request. This can be hard since it
> imposes such a tight time limit. Consider doing recommendations
> asynchronously if you can. For example, start computing
> recommendations when the user logs in, and maybe on the 2nd page view
> 5 seconds later, you are ready to recommend something.

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