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https://issues.apache.org/jira/browse/SOLR-8542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15761675#comment-15761675
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ASF subversion and git services commented on SOLR-8542:
-------------------------------------------------------
Commit c8542b2bd0470af9f8d64bb8133f31828b342604 in lucene-solr's branch
refs/heads/master from [~cpoerschke]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=c8542b2 ]
SOLR-8542: techproducts example now includes (disabled) learning-to-rank
support (enable via -Dsolr.ltr.enabled=true)
additional changes as follows:
* LTRFeatureLoggerTransformerFactory:
** feature values cache name configurable (instead of hard-coded value that
needs to match solrconfig.xml configuration)
** javadocs (example and parameters)
* CSV FeatureLogger:
** removed delimiter and separator assumptions in tests
** changed delimiter and separator (from "key:val;key:val" to "key=val,key=val")
** configurable (key value) delimiter and (features) separator
* JSON FeatureLogger:
** defer support for this (removing MapFeatureLogger class)
* adds 'training libraries' to (Linear|MultipleAdditiveTrees)Model javadocs
(Diego Ceccarelli, Michael Nilsson, Christine Poerschke)
> Integrate Learning to Rank into Solr
> ------------------------------------
>
> Key: SOLR-8542
> URL: https://issues.apache.org/jira/browse/SOLR-8542
> Project: Solr
> Issue Type: New Feature
> Reporter: Joshua Pantony
> Assignee: Christine Poerschke
> Priority: Minor
> Attachments: SOLR-8542-branch_5x.patch, SOLR-8542-trunk.patch,
> SOLR-8542.patch
>
>
> This is a ticket to integrate learning to rank machine learning models into
> Solr. Solr Learning to Rank (LTR) provides a way for you to extract features
> directly inside Solr for use in training a machine learned model. You can
> then deploy that model to Solr and use it to rerank your top X search
> results. This concept was previously [presented by the authors at Lucene/Solr
> Revolution
> 2015|http://www.slideshare.net/lucidworks/learning-to-rank-in-solr-presented-by-michael-nilsson-diego-ceccarelli-bloomberg-lp].
> [Read through the
> README|https://github.com/bloomberg/lucene-solr/tree/master-ltr-plugin-release/solr/contrib/ltr]
> for a tutorial on using the plugin, in addition to how to train your own
> external model.
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