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https://issues.apache.org/jira/browse/LUCENE-5736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14021163#comment-14021163
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Gergő Törcsvári commented on LUCENE-5736:
-----------------------------------------

The online modification of the SimpleNaiveBayesClassifier in the 5699 
attachment and mentioned in the comment too.
The KNN classifier was online out of the box if the user use commit properly, 
or use a near-real-time writer.


> Separate the classifiers to online and caching where possible
> -------------------------------------------------------------
>
>                 Key: LUCENE-5736
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5736
>             Project: Lucene - Core
>          Issue Type: Sub-task
>          Components: modules/classification
>            Reporter: Gergő Törcsvári
>         Attachments: CachingNaiveBayesClassifier.java
>
>
> The Lucene classifier implementations are now near onlines if they get a near 
> realtime reader. It is good for the users whoes have a continously changing 
> dataset, but slow for not changing datasets.
> The idea is: What if we implement a cache and speed up the results where it 
> is possible.



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