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https://issues.apache.org/jira/browse/SOLR-13500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16907000#comment-16907000
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Dr Oleg Savrasov commented on SOLR-13500:
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At first glance this looks like duplicate of
https://issues.apache.org/jira/browse/SOLR-12890
> Vector Search with Solr
> -----------------------
>
> Key: SOLR-13500
> URL: https://issues.apache.org/jira/browse/SOLR-13500
> Project: Solr
> Issue Type: New Feature
> Reporter: Dr Oleg Savrasov
> Priority: Major
>
> In machine learning problems we usually need to find nearest neighbors in
> dense high dimensional vector space. Often, this retrieval had to be
> augmented with traditional Boolean retrieval.
> While no efficient KNN implementation is available in Solr yet, in practice
> people are using brute-force vector distance sorting after Boolean retrieval
> limits number of candidate vectors.
> It's proposed to add a clear way to implement such a solution with Solr.
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