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  1. Solr
  2. SOLR-908

Port of Nutch CommonGrams filter to Solr

    Details

    • Type: Wish
    • Status: Closed
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.4
    • Component/s: Schema and Analysis
    • Labels:
      None

      Description

      Phrase queries containing common words are extremely slow. We are reluctant to just use stop words due to various problems with false hits and some things becoming impossible to search with stop words turned on. (For example "to be or not to be", "the who", "man in the moon" vs "man on the moon" etc.)

      Several postings regarding slow phrase queries have suggested using the approach used by Nutch. Perhaps someone with more Java/Solr experience might take this on.

      It should be possible to port the Nutch CommonGrams code to Solr and create a suitable Solr FilterFactory so that it could be used in Solr by listing it in the Solr schema.xml.

      "Construct n-grams for frequently occuring terms and phrases while indexing. Optimize phrase queries to use the n-grams. Single terms are still indexed too, with n-grams overlaid."
      http://lucene.apache.org/nutch/apidocs-0.8.x/org/apache/nutch/analysis/CommonGrams.html

        Attachments

        1. CommonGramsPort.zip
          14 kB
          Tom Burton-West
        2. SOLR-908.patch
          46 kB
          Tom Burton-West
        3. SOLR-908.patch
          47 kB
          Tom Burton-West
        4. SOLR-908.patch
          91 kB
          Jason Rutherglen
        5. SOLR-908.patch
          45 kB
          Jason Rutherglen
        6. SOLR-908.patch
          43 kB
          Jason Rutherglen
        7. SOLR-908.patch
          38 kB
          Jason Rutherglen
        8. SOLR-908.patch
          36 kB
          Jason Rutherglen
        9. SOLR-908.patch
          37 kB
          Jason Rutherglen
        10. SOLR-908.patch
          38 kB
          Jason Rutherglen

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              • Assignee:
                yseeley@gmail.com Yonik Seeley
                Reporter:
                tbw Tom Burton-West
              • Votes:
                3 Vote for this issue
                Watchers:
                5 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: