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https://issues.apache.org/jira/browse/SOLR-8542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15163098#comment-15163098
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Christine Poerschke commented on SOLR-8542:
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The branch behind the https://github.com/apache/lucene-solr/pull/4 above is
[master-ltr-plugin-rfc|https://github.com/bloomberg/lucene-solr/tree/master-ltr-plugin-rfc]
and i've just created
[master-ltr-plugin-rfc-cpoerschke-comments|https://github.com/bloomberg/lucene-solr/tree/master-ltr-plugin-rfc-cpoerschke-comments]
branch off that.
In (unrelated) SOLR-8621 we had an in-progress branch also and its usage and
intentions emerged and were clarified over time, and so based on that perhaps
it's helpful to suggest usage up-front here:
* master-ltr-plugin-rfc branches off (Jan 29th) master
* master-ltr-plugin-rfc-cpoerschke-comments branches off (Feb 24th)
master-ltr-plugin-rfc
* 'git merge' and 'git rebase' and 'git --force push' will be avoided
* further commits to master-ltr-plugin-rfc* are anticipated
* 'git cherry-pick' of changes from master to master-ltr-plugin-rfc* will be
done where helpful (e.g. SOLR-8600 was cherry-picked from master to
master-ltr-plugin-rfc-cpoerschke-comments)
* cherry-picking between master-ltr-plugin-rfc* branches welcome and will be
done where helpful
* at some point in the future activity on master-ltr-plugin-rfc* branches will
cease and if required a new (say) master-ltr-plugin-rfc-march branch off (Mar
1?th) master will be created
* at the very end everything will be squashed and rebased onto latest master
and then committed as a single commit
Does that sound workable or too complicated? Alternatives, comments, etc.
welcome as usual. (And to clarify, suggested usage here is specific for this
SOLR-8542 ticket only, any general recommended usage type discussions would be
for elsewhere.)
> 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: README.md, README.md, 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
> ).
> The attached code was jointly worked on by Joshua Pantony, Michael Nilsson,
> David Grohmann and Diego Ceccarelli.
> Any chance this could make it into a 5x release? We've also attached
> documentation as a github MD file, but are happy to convert to a desired
> format.
> h3. Test the plugin with solr/example/techproducts in 6 steps
> Solr provides some simple example of indices. In order to test the plugin
> with
> the techproducts example please follow these steps
> h4. 1. compile solr and the examples
> cd solr
> ant dist
> ant example
> h4. 2. run the example
> ./bin/solr -e techproducts
> h4. 3. stop it and install the plugin:
>
> ./bin/solr stop
> mkdir example/techproducts/solr/techproducts/lib
> cp build/contrib/ltr/lucene-ltr-6.0.0-SNAPSHOT.jar
> example/techproducts/solr/techproducts/lib/
> cp contrib/ltr/example/solrconfig.xml
> example/techproducts/solr/techproducts/conf/
> h4. 4. run the example again
>
> ./bin/solr -e techproducts
> h4. 5. index some features and a model
> curl -XPUT 'http://localhost:8983/solr/techproducts/schema/fstore'
> --data-binary "@./contrib/ltr/example/techproducts-features.json" -H
> 'Content-type:application/json'
> curl -XPUT 'http://localhost:8983/solr/techproducts/schema/mstore'
> --data-binary "@./contrib/ltr/example/techproducts-model.json" -H
> 'Content-type:application/json'
> h4. 6. have fun !
> *access to the default feature store*
> http://localhost:8983/solr/techproducts/schema/fstore/_DEFAULT_
> *access to the model store*
> http://localhost:8983/solr/techproducts/schema/mstore
> *perform a query using the model, and retrieve the features*
> http://localhost:8983/solr/techproducts/query?indent=on&q=test&wt=json&rq={!ltr%20model=svm%20reRankDocs=25%20efi.query=%27test%27}&fl=*,[features],price,score,name&fv=true
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