Lucene, Nutch and Solr

I have had a lot of research about optimizing Apachesolr for non-english languages, especially for German. It comes out, that there search results can be dramatically improved by adjusting Solr's stemming and by breaking up compound words. This can be easily achieved with slight changes to Apachesolr's schema.xml.

This post is about configuring stemming:
http://www.early-dance.de/en/news/9188-optimizing-apachesolr-non-english...

And this post is about compound word splitting, that is needed in languages like German that have long combined words like "Dampfschifffahrt":
http://www.early-dance.de/en/news/9189-apachesolr-issues-german-and-othe...

I have this params array:

$params = array(
'fl' => 'id,nid,title,body,format,comment_count,type,created,changed,score,url,uid,name,sis_project_release_usage,ds_project_latest_release,ds_project_latest_activity',
'rows' => variable_get('apachesolr_rows', 10),
'facet' => 'true',
'facet.mincount' => 1,
'facet.sort' => 'true',
'facet.field' => array(
'im_vid_'. _project_get_vid(),
'im_project_release_api_tids',
),
'facet.limit' => 200,
'sort' => $query->solrsort,
);

Resources

• solr-user-subscribe@lucene.apache.org

Nitpicks

• Dependency on search module
• Do we need keywords as the path? Or can they just be GET parameters?
• $params is GOOD because it is totally openly hackable
• Do we want to create a set of new classes and each handles a type of search? Subclasses of a generic class?
• Do we need to replace or rewrite the PHP library?
• Is there a way to add facets without a custom module
• Facets tend to just be displayed as lists.

When i perform searches for tools and for tool with Apachesolr, i get the same results. As far as i know, the reason is Apachesolr's stemmer, that reduces the word tools to tool and uses it for the search within the index. As far as i know, the stemmer is only aware of English stemming rules.

So how are things going, when using Apachesolr with different languages? For example, i tried the German word Kunden (plural of clients) and Kunde (singular of client) and i get different result sets. -- Obviously, the stemmer doesn't know the German stemming rules ... right?

How can the search results be improved for languages different from English? Are there German stemmers available to plug into Apachesolr?

The Apache Solr RDF module is now in a state, where it can already, theoretically, be used. However, there is much room for improvement, so I'd like to discuss some possible ways to do this.

Hi All,

I want to know we can implement single apache solr instance for multiple sites, what all changes required to done...???

Jatinder

Hi All,

After adding double-click ad server for ads into my site, its page load time increase and performace is slower then earlier...

I want to know how to increase/optimze the page load performace, when i am using double click ad server.

Best,
Jatinder Cheema

Project information

Project page on drupal.org: ApacheSolr RDF Support
Student: Thomas Seidl (drunken monkey on d.o)
Mentor: Robert Douglass (robertDouglass)
Co-mentor: Stephane Corlosquet (scor)
Local mentor: Wolfgang Ziegler (fago)

Current status: Adding features

Description

This project will improve the ApacheSolr module by enabling it to handle (i.e., index and search with a comfortable UI) any kind of RDF data. This will instantly make it possible to provide meaningful searches for all site content that isn't node-centric, as well as content from anywhere else on the web. Only an RDF class description and a way to access the data would have to be provided (apart from the normal Solr requirements) and the module would automatically do the rest of the work.

Hi,

Can anyone let me know if it is possible to index and search multiple Drupal and non-drupal websites using the ApacheSolr module?

If not please let me know of any other way that this could be achieved.

Thanks