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https://issues.apache.org/jira/browse/SOLR-8542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15603212#comment-15603212
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Michael Nilsson commented on SOLR-8542:
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Hey [~adeppa],
So our plan is to get this merged into master, roughly solr 7x, very soon. We
will then be working on backporting the commit/patch to 6x so it can be rolled
out in a solr release. We would strongly recommend you upgrade to 6x to get
access to a sturdier and more performant solr version with access to new
features like the plugin.
If upgrading to 6x is not possible, you could cherry-pick the commit into your
own branch_5x solr repo and resolve any conflicts. However, there have been
many changes compared to what's in master which affect the code the plugin was
built on, so the backporting would take some effort.
-Mike
> 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
>
>
> 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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