scores are the same for many diferent documents

[Marc Sturlese <ma...@gmail.com>]

Hey there,
I see that when solr gives me back the scores in the response it are the
same for many different documents.

I have build a simple index for testing purposes with just documents with
one field indexed with standard analyzer and containing pices of text.
I have done the same with a self coded simple lucene indexer.

Quering to the solr index with qt=standard&q=title:laptop will give me back
documents, some of them exactly with the same score.
Quering to the lucene index (with a simple self coded search app) with
title:laptop will give me back no equal scores.

When building solr index I have tryied both omitNorms=true and
omitNorms=false. It will give me different scores but in both cases there
are some equal scores.

I am testing this because I have a Solr component with a
FieldComparatorSource wich uses the scores and other external factors for
the sorting. Having same score for different documents combined with
external factors may give me back results in unexpected undesired order
-- 
View this message in context: http://old.nabble.com/scores-are-the-same-for-many-diferent-documents-tp27623039p27623039.html
Sent from the Solr - User mailing list archive at Nabble.com.

Re: scores are the same for many diferent documents

[Erick Erickson <er...@gmail.com>]

OmitNorms=false is probably what you want. Did you re-create your
index for each test?

Also, what does debutQuery=true show?

You could get a copy of Luke (google Lucene Luke) and use that to
examine your index to see how things score, which would give you
some clue whether your index (and Lucene) were scoring things
identically or whether there was a different issue...

HTH
Erick

On Wed, Feb 17, 2010 at 7:35 AM, Marc Sturlese <ma...@gmail.com>wrote:

>
> Hey there,
> I see that when solr gives me back the scores in the response it are the
> same for many different documents.
>
> I have build a simple index for testing purposes with just documents with
> one field indexed with standard analyzer and containing pices of text.
> I have done the same with a self coded simple lucene indexer.
>
> Quering to the solr index with qt=standard&q=title:laptop will give me back
> documents, some of them exactly with the same score.
> Quering to the lucene index (with a simple self coded search app) with
> title:laptop will give me back no equal scores.
>
> When building solr index I have tryied both omitNorms=true and
> omitNorms=false. It will give me different scores but in both cases there
> are some equal scores.
>
> I am testing this because I have a Solr component with a
> FieldComparatorSource wich uses the scores and other external factors for
> the sorting. Having same score for different documents combined with
> external factors may give me back results in unexpected undesired order
> --
> View this message in context:
> http://old.nabble.com/scores-are-the-same-for-many-diferent-documents-tp27623039p27623039.html
> Sent from the Solr - User mailing list archive at Nabble.com.
>
>