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  1. Solr
  2. SOLR-8183

Add Learning to Rank framework to Solr


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


      Add a Learning to Rank or Machine Learned Ranking framework to Solr. The framework should be able to
      1. Generate user-result-click tracking logs
      2. Learning/Training component which is based on something like Ranklib (http://sourceforge.net/p/lemur/wiki/RankLib/)
      3. Push the model learnt in step 2 to Solr through the existing rerank framework

      I have a very crude experimental code for step 2 and 3 working (thanks to the help from Joel Bernstein).
      For step 1 I was wondering if Solr has an open source version of https://docs.lucidworks.com/display/lweug/Click+Scoring+Relevance+Framework
      If there existing something like this then it wont be hard to close the loop and have an nice feedback loop implementation on LTR framework.

      I feel there should be a big push on the overall algorithmic front which will help LTR framework.
      Something like the Fair Pairs algorithm switch in Solr to turn on/off to generate unbiased clicked data will be pretty hand for optimizing the ranking through LTR.
      Also better support for experimenting with multi-arm bandits in search rankings will be pretty handy too! https://www.cs.cornell.edu/~rdk/papers/icml08.pdf

      This calls for a better architecture to
      1. Collect user behavior data
      2. Learn a ML-model based on User data
      3. Experiment / collect unbiased datasets from deployed models


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              • Assignee:
                ajinkyakale Ajinkya Kale
              • Votes:
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