Details

    • Type: New Feature
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      Weka is one of the most popular data mining package on the planet. It's used by numerous people around the world. Since weka is in Java, it should be pretty straight-forward to integrate weka with Hive.

      We just need to create some GenericUDAF functions that maps to Weka classifier training process. The output of the GenericUDAF can just be the serialized version of the trained classifiers.
      We should add another GenericUDF to load the classifier to classify new instances.

      The hive syntax can be as simple as this: (Note: In the example above, most of the "table." can be omitted. I put it there just for easier understanding of the query semantics.)

      The query builds a model (logistic regression) for predicting the CTR of each link on each page, based on user information, and evaluates the model on some data.

      SELECT logdata.pageid, logdata.linkid, LogisticRegression( logdata.clicked, userinfo.age, userinfo.gender, userinfo.country, userinfo.interests ) as model
      FROM logdata JOIN userinfo
      ON logdata.userid = userinfo.userid
      GROUP BY logdata.pageid, logdata.linkid;
      
      SELECT logdata.pageid, logdata.linkid, logdata.clicked, LogisticRegressionEvaluate(classifiers.model, userinfo.age, userinfo.gender, userinfo.country, userinfo.interests) AS predicted
      FROM logdata JOIN userinfo
      ON logdata.userid = userinfo.userid
      JOIN classifiers
      ON logdata.pageid = classifiers.pageid AND logdata.linkid = classifiers.linkid
      

      References:
      Use Weka in your Java Code: http://weka.wiki.sourceforge.net/Use+Weka+in+your+Java+code

      Note:
      Weka is under GPL license. We won't be able to include the code directly into Hive, but we can keep the discussions here.

        Attachments

        1. weka.jar
          5.09 MB
          Zheng Shao
        2. HIVE-672.2.not.to.be.included.patch
          12 kB
          Zheng Shao
        3. HIVE-672.1.not.to.be.included.patch
          20 kB
          Zheng Shao

          Activity

            People

            • Assignee:
              zshao Zheng Shao
              Reporter:
              zshao Zheng Shao
            • Votes:
              4 Vote for this issue
              Watchers:
              9 Start watching this issue

              Dates

              • Created:
                Updated: