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Posted to dev@lucene.apache.org by "Rahul Babulal (JIRA)" <ji...@apache.org> on 2017/02/21 20:29:44 UTC

[jira] [Created] (SOLR-10183) A real scaling normalizer in solr-ltr

Rahul Babulal created SOLR-10183:
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             Summary: A real scaling normalizer in solr-ltr
                 Key: SOLR-10183
                 URL: https://issues.apache.org/jira/browse/SOLR-10183
             Project: Solr
          Issue Type: New Feature
      Security Level: Public (Default Security Level. Issues are Public)
    Affects Versions: 6.4.1
            Reporter: Rahul Babulal


The current solr-ltr plugin provider two different normalizer implementations, minMax and standard normalizer. The mimMax normalizer doesn't seem to correctly scale the values to fall in between the given min and max.   The solr scale function [1] appropriately scales the values to fall in between the given range. But it cannot be used as it is, because it has performance problems and makes the scoring process really slow.  


[1]https://wiki.apache.org/solr/FunctionQuery#scale



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