Boost search results in Nutch 2.2.1

[A Laxmi <a....@gmail.com>]

Hi,


When I started to compare the search results with the two options below, I
see a lot of difference in the search results esp. the urls that show up on
the top (Relevancy perspective).

(1) Nutch 2.2.1 (with Solr 4.0)
(2) Bing custom search set-up

I wonder how should I tweak the boost parameters to get the best results on
the top like how Bing, Google does.

Here is what i got in solrconfig.xml:

 <str name="defType">edismax</str>
       <str name="qf">
         text^0.5 features^1.0 name^1.2 sku^1.5 id^10.0 manu^1.1 cat^1.4
       </str>
       <str name="q.alt">*:*</str>
       <str name="rows">10</str>
       <str name="fl">*,score</str>


On the fron-end, I am passing this (which should overwrite what is in
solrconfig.xml ?)-

title^10 content^5 url^5'

Please suggest why I see a difference and what parameters would best to
configure to achieve what I get from Bing, or Google

Thanks