Re: how to interpret the Solr score ?

[Pierre-Yves LANDRON <pl...@hotmail.com>]

Thank you Yonik,

I haven't seen that maxScore you're speaking about. It's exactly what I 
needed.

Cheers,
P-Y L


>From: "Yonik Seeley" <yo...@apache.org>
>Reply-To: solr-user@lucene.apache.org
>To: solr-user@lucene.apache.org
>Subject: Re: how to interpret the Solr score ?
>Date: Wed, 28 Feb 2007 12:31:34 -0500
>
>On 2/28/07, Pierre-Yves LANDRON <pl...@hotmail.com> wrote:
>>A silly question, but I think the subject isn't cover on the Solr wiki :
>>I'd like to use the score returned by Solr to give the user an estimation 
>>of
>>the response adequacy to his request (ok, that's what the score is 
>>for...).
>>But I cannot figure the meaning of this score : is it a precentage of the
>>response relevancy ? is it absolute, or relative to others given response 
>>?
>>Is it the raw Lucene score (perhaps I'm wrong but it doesn't seems it is 
>>in
>>my case) ? Is there a way to obtain a meaningful score ( ie: human 
>>readable
>>) ?
>
>It's the raw lucene score.  Some lucene functions normalize the score
>by dividing all scores by the top score in matching documents, if that
>top score is greater than 1.  Solr also returns maxScore so you can do
>the same if you desire.
>
>-Yonik

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Re: No segments file after optimizing using Luke

[Yonik Seeley <yo...@apache.org>]

On 4/11/07, Michael Levy <Lu...@gmail.com> wrote:
> After using Luke v0.7 to Optimize Index, with either "Using Standard
> Format" or "Using Compound Format", and restarting Solr using jetty, I
> get a java.io.FileNotFoundException indicating that it can't find the
> segments file.
>
> There's no segments file in the index directory, but Luke optimization
> created files named segments_n (n being 3 for standard format and 6 for
> compound format) and segments.gen.
>
> How can I resolve this?  Thanks in advance!

If you are going to use another program to modify a Solr-Lucene index,
make sure that program is using the same version of Lucene that Solr
is :-)

The very latest version of Luke uses Lucene 2.1, which is later than
Solr1.1 uses.
Try using a nightly build of Solr.

-Yonik

No segments file after optimizing using Luke

[Michael Levy <Lu...@gmail.com>]

After using Luke v0.7 to Optimize Index, with either "Using Standard 
Format" or "Using Compound Format", and restarting Solr using jetty, I 
get a java.io.FileNotFoundException indicating that it can't find the 
segments file.

There's no segments file in the index directory, but Luke optimization 
created files named segments_n (n being 3 for standard format and 6 for 
compound format) and segments.gen.

How can I resolve this?  Thanks in advance!

Re: how to interpret the Solr score ?

[Yonik Seeley <yo...@apache.org>]

On 3/1/07, Pierre-Yves LANDRON <pl...@hotmail.com> wrote:
> I haven't seen that maxScore you're speaking about. It's exactly what I
> needed.

It's an attribute in <result> when you elect to return scores.

<?xml version="1.0" encoding="UTF-8"?>
<response>
<lst name="responseHeader">
 <int name="status">0</int>
 <int name="QTime">0</int>
 <lst name="params">
  <str name="fl">score,*</str>
  <str name="q">ipod</str>
  <str name="indent">on</str>
 </lst>
</lst>
<result name="response" numFound="3" start="0" maxScore="2.4851787">
 <doc>
  <float name="score">2.4851787</float>
  <arr name="cat"><str>electronics</str><str>connector</str></arr>
  <arr name="features"><str>car power adapter for iPod, white</str></arr>
  <str name="id">IW-02</str>
  <bool name="inStock">false</bool>
  <str name="manu">Belkin</str>
  <str name="name">iPod &amp; iPod Mini USB 2.0 Cable</str>
  <int name="popularity">1</int>
  <float name="price">11.5</float>
  <str name="sku">IW-02</str>
  <date name="timestamp">2007-01-31T05:12:44.484Z</date>
  <float name="weight">2.0</float>
 </doc>
 <doc>
[...]