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From Erik Hatcher <>
Subject Re: Dynamic Boosting
Date Thu, 31 Jul 2008 23:38:21 GMT
How about tinkering with the boosting query (bq) parameter or the  
boosting function (bf) parameter?

I believe clever bq'ing would probably do the trick, huh?


On Jul 31, 2008, at 7:34 PM, CameronL wrote:

> My problem is a little complex, so please bear with me.
> I currently have a set of documents that need to be "tiered", and  
> depending
> on what tier they are in, a configurable boost should be applied,
> essentially affecting the score and ordering of the search results.
> My first idea was to create 10 different fields in my schema for these
> tiers:
> <field name="Tier1" type="boolean" index="true" stored="false"/>
> <field name="Tier2" type="boolean" index="true" stored="false"/>
> ...
> <field name="Tier10" type="boolean" index="true" stored="false"/>
> Each document may be part of 0 or 1 tiers.  Then, when a search is
> requested, I would use the dismax handler to add different boosts to  
> the
> tier fields: "Tier1^1.1 Tier2^1.2 Tier3^1.3..."
> The desired effect is to give a little bit of boost to items that  
> are in
> Tier 10 over items that are in, say, Tier 5 or in no tier.  That is,  
> for
> items that also match the search term criteria (my default search  
> field is
> "name").
> As you can see, the flaw in my little plan above is that there isn't  
> really
> a good way to factor in the Tier fields into the search.  I could  
> probably
> try to add additional criteria (" AND Tier1:true OR Tier2:true...")  
> but it
> still wouldn't work to include the documents that match the search  
> term but
> have no tier.
> Is there another technique I should be using to achieve my desired  
> effect?
> I'm a little stuck; your help would be much appreciated.  Hope I am  
> making
> sense.
> -- 
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