An overview of some of the tips and tricks to improve search results.

1. Solr Tuning:Improving Relevancy

2. Agenda
✤ Solr Schema Basics
✤ Some of Drupal’s Apache Solr Hooks
✤ Why isn’t my content at the top?
✤ Admin Field Analyser
✤ Query Debug
✤ Other Apache Solr Modules

3. Solr Schema Basics
- Schema.xml
✤ Types
✤ Raw - int, long, string, date, double, etc
✤ Custom - Made up of raw plus
✤ analyzers - index and query
✤ tokenizers - break up content
✤ filters

4. Schema Cont..
<fieldType name="text" class="solr.TextField" positionIncrementGap="100">
<analyzer type="index">
<charFilter class="solr.MappingCharFilterFactory" mapping="ISOLatin1.txt"/>
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt"
ignoreCase="true" expand="false"/>
<filter class="solr.StopFilterFactory" words="stopwords.txt"/>
<filter class="solr.WordDelimiterFilterFactory" protected="protwords.txt"
splitOnCaseChange="1" />
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.SnowballPorterFilterFactory" language="English"
protected="protwords.txt"/>
<filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
</analyzer>
<analyzer type="query"><!-- Repeated For Query --></analyzer>
</fieldType>

5. Apache Solr Module Hooks
hook_apachesolr_modify_query
✤ Provides ability to override standard solr query
✤ Useful additions include:
✤ Query Filtering
✤ AND/OR keyword separators
✤ Term boosting - primary AND literacy^30
✤ Term Proximity “primary literacy”~2

6. Apache Solr Module Hooks
✤ hook_apachesolr_process_results
✤ hook_apachesolr_update_index
✤ hook_apachesolr_search_result
✤ hook_apachesolr_prepare_query
✤ hook_apachesolr_types_exclude
✤ hook_apachesolr_node_exclude
✤ and more added per release....

7. Why is my content at the top?
Admin Field Analyser

8. Why is my content at the top?
✤ Query Debug
✤ http://localhost:8080/solr2/core3/select/?q=primary
+literacy&version=2.2&start=0&rows=10&indent=on&debugQuery=true
<str name="http://archive.teachfind.com/becta/localauthorities.becta.org.uk/index.html">
2.3873122 = (MATCH) sum of:
0.84451145 = (MATCH) weight(body:primari in 14212), product of:
0.59476876 = queryWeight(body:primari), product of:
1.54579 = idf(docFreq=13202, maxDocs=22788)
0.38476688 = queryNorm
1.4198987 = (MATCH) fieldWeight(body:primari in 14212), product of:
2.4494898 = tf(termFreq(body:primari)=6)
1.54579 = idf(docFreq=13202, maxDocs=22788)
0.375 = fieldNorm(field=body, doc=14212)
1.5428007 = (MATCH) weight(body:literaci in 14212), product of:
0.8038968 = queryWeight(body:literaci), product of:
2.0893087 = idf(docFreq=7666, maxDocs=22788)
0.38476688 = queryNorm
1.9191527 = (MATCH) fieldWeight(body:literaci in 14212), product of:
2.4494898 = tf(termFreq(body:literaci)=6)
2.0893087 = idf(docFreq=7666, maxDocs=22788)
0.375 = fieldNorm(field=body, doc=14212)
</str>

9. Other Modules
✤ Multi Server
✤ Attachments
✤ Apache Solr Views
✤ Autocomplete
✤ A12:Find (coming soon)
✤ Solr 3.2
✤ Field Grouping
✤ Drupal 6 and 7 support
✤ Geo Local
✤ Industry Specific Synonyms

10. Questions?