Hi Tom, The global similarity must be able to delegate similarity to your per-field setting. Solr has the SchemaSimilarityFactory that can do this. Please replace your global similarity with:
<similarity class="solr.SchemaSimilarityFactory"/> Keep in mind that coord and queryNorm (=1.0f) are not implemented now, so you will get different scores for TF-IDF! Cheers, -----Original message----- > From:Tom Burton-West <tburt...@umich.edu> > Sent: Mon 17-Dec-2012 23:11 > To: solr-user@lucene.apache.org > Subject: configuring per-field similarity in Solr 4: "the global > similarity does not support it" > > Hello, > > I have Solr 4 configured with several fields using different similarity > classes according to: > http://wiki.apache.org/solr/SchemaXml#Similarity > > However, I get this error message: > " FieldType 'DFR' is configured with a similarity, but the global > similarity does not support it: class > org.apache.solr.search.similarities.DefaultSimilarityFactory" > > Excerpt from schema.xml below. > > What I am trying to do is have any field that doesn't specify a similarity > to use the default, but to set up 3 specific fields to use the DFR, IB, and > BM25 similarities respectively. > > I think I'm missing something here. Can someone point me to documentation > or examples? > > Tom > > ---------------- > Simplified schema.xml excerpt: > <fieldType name="CJKFullText" class="solr.TextField" > positionIncrementGap="100" autoGeneratePhraseQueries="false"> > <analyzer type="index"> > <tokenizer class="solr.ICUTokenizerFactory"/> > <filter class="solr.ICUFoldingFilterFactory"/> > </analyzer> > <analyzer type="query"> > <tokenizer class="solr.ICUTokenizerFactory"/> > <filter class="solr.ICUFoldingFilterFactory"/> > </analyzer> > </fieldType> > > <!--###########################################################--> > <!-- relevance rank testing --> > > > <fieldType name="DFR" class="solr.TextField" positionIncrementGap="100" > autoGeneratePhraseQueries="false"> > <analyzer type="index"> > <tokenizer class="solr.ICUTokenizerFactory"/> > <filter class="solr.ICUFoldingFilterFactory"/> > </analyzer> > <analyzer type="query"> > <tokenizer class="solr.ICUTokenizerFactory"/> > > <filter class="solr.ICUFoldingFilterFactory"/> > </analyzer> > > <similarity class="solr.DFRSimilarityFactory"> > <str name="basicModel">I(F)</str> > <str name="afterEffect">B</str> > <str name="normalization">H2</str> > </similarity> > > > </fieldType> > > > <fieldType name="IB" class="solr.TextField" positionIncrementGap="100" > autoGeneratePhraseQueries="false"> > <analyzer type="index"> > <tokenizer class="solr.ICUTokenizerFactory"/> > <filter class="solr.ICUFoldingFilterFactory"/> > </analyzer> > <analyzer type="query"> > <tokenizer class="solr.ICUTokenizerFactory"/> > <filter class="solr.ICUFoldingFilterFactory"/> > </analyzer> > > <similarity class="solr.IBSimilarityFactory"> > <str name="distribution">SPL</str> > <str name="lambda">DF</str> > <str name="normalization">H2</str> > </similarity> > </fieldType> > > > <fieldType name="BM25" class="solr.TextField" positionIncrementGap="100" > autoGeneratePhraseQueries="false"> > <analyzer type="index"> > <tokenizer class="solr.ICUTokenizerFactory"/> > <filter class="solr.ICUFoldingFilterFactory"/> > </analyzer> > <analyzer type="query"> > <tokenizer class="solr.ICUTokenizerFactory"/> > <filter class="solr.ICUFoldingFilterFactory"/> > </analyzer> > > <similarity class="solr.BM25SimilarityFactory"> > <!-- start with the defaults --> > <float name="k1">1.2</float> > <float name="b">0.75</float> > </similarity> > > </fieldType> > > > > > > > > > > > =======================================================================================- > Excerpt from actual schema.xml > <fieldType name="CJKFullText" class="solr.TextField" > positionIncrementGap="100" autoGeneratePhraseQueries="false"> > <analyzer type="index"> > <tokenizer class="solr.ICUTokenizerFactory"/> > <filter class="solr.ICUFoldingFilterFactory"/> > <filter class="solr.CJKBigramFilterFactory" > han="true" hiragana="true" > katakana="false" hangul="false" /> > > > <filter class="solr.CommonGramsFilterFactory" > words="1000common.txt" /> > </analyzer> > <analyzer type="query"> > <tokenizer class="solr.ICUTokenizerFactory"/> > > <filter class="solr.ICUFoldingFilterFactory"/> > <filter class="solr.CJKBigramFilterFactory" > han="true" hiragana="true" > katakana="false" hangul="false" /> > > <filter class="solr.CommonGramsQueryFilterFactory" > words="1000common.txt" /> > </analyzer> > </fieldType> > > <!--###########################################################--> > <!-- relevance rank testing --> > > > <fieldType name="DFR" class="solr.TextField" positionIncrementGap="100" > autoGeneratePhraseQueries="false"> > <analyzer type="index"> > <tokenizer class="solr.ICUTokenizerFactory"/> > <filter class="solr.ICUFoldingFilterFactory"/> > <filter class="solr.CJKBigramFilterFactory" > han="true" hiragana="true" > katakana="false" hangul="false" /> > > > <filter class="solr.CommonGramsFilterFactory" > words="1000common.txt" /> > </analyzer> > <analyzer type="query"> > <tokenizer class="solr.ICUTokenizerFactory"/> > > <filter class="solr.ICUFoldingFilterFactory"/> > <filter class="solr.CJKBigramFilterFactory" > han="true" hiragana="true" > katakana="false" hangul="false" /> > > <filter class="solr.CommonGramsQueryFilterFactory" > words="1000common.txt" /> > </analyzer> > > <similarity class="solr.DFRSimilarityFactory"> > <str name="basicModel">I(F)</str> > <str name="afterEffect">B</str> > <str name="normalization">H2</str> > </similarity> > > > </fieldType> > > > <fieldType name="IB" class="solr.TextField" positionIncrementGap="100" > autoGeneratePhraseQueries="false"> > <analyzer type="index"> > <tokenizer class="solr.ICUTokenizerFactory"/> > <filter class="solr.ICUFoldingFilterFactory"/> > <filter class="solr.CJKBigramFilterFactory" > han="true" hiragana="true" > katakana="false" hangul="false" /> > > > <filter class="solr.CommonGramsFilterFactory" > words="1000common.txt" /> > </analyzer> > <analyzer type="query"> > <tokenizer class="solr.ICUTokenizerFactory"/> > > <filter class="solr.ICUFoldingFilterFactory"/> > <filter class="solr.CJKBigramFilterFactory" > han="true" hiragana="true" > katakana="false" hangul="false" /> > > <filter class="solr.CommonGramsQueryFilterFactory" > words="1000common.txt" /> > </analyzer> > <similarity class="solr.IBSimilarityFactory"> > <str name="distribution">SPL</str> > <str name="lambda">DF</str> > <str name="normalization">H2</str> > </similarity> > > > </fieldType> > > > <fieldType name="BM25" class="solr.TextField" positionIncrementGap="100" > autoGeneratePhraseQueries="false"> > <analyzer type="index"> > <tokenizer class="solr.ICUTokenizerFactory"/> > <filter class="solr.ICUFoldingFilterFactory"/> > <filter class="solr.CJKBigramFilterFactory" > han="true" hiragana="true" > katakana="false" hangul="false" /> > > > <filter class="solr.CommonGramsFilterFactory" > words="1000common.txt" /> > </analyzer> > <analyzer type="query"> > <tokenizer class="solr.ICUTokenizerFactory"/> > > <filter class="solr.ICUFoldingFilterFactory"/> > <filter class="solr.CJKBigramFilterFactory" > han="true" hiragana="true" > katakana="false" hangul="false" /> > > <filter class="solr.CommonGramsQueryFilterFactory" > words="1000common.txt" /> > </analyzer> > > > <similarity class="solr.BM25SimilarityFactory"> > <!-- start with the defaults --> > <float name="k1">1.2</float> > <float name="b">0.75</float> > </similarity> > > </fieldType> >
