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https://issues.apache.org/jira/browse/LUCENE-4503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13483322#comment-13483322
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Ying Andrews commented on LUCENE-4503:
--------------------------------------
* Added support for multiple index readers so More Like This can generate a
similary query based on multiple indexes.
* This extends the MoreLikeThis feature to work with lucene MultSsearcher.
*
* For example:
* Due to large size we may want to divide all sales index into: sales_1,
sale_2, sales_3, ..., sales_n.
* In this case we would best use parallel multi-searcher to do the search. Old
MoreLikeThis.java doesn't support
* this scenario. If the current document of interest comes from index
sales_1, then the query returned from
* like(int) and like(Reader, String) will only be based on index sales_1,
which apparently does not reflect the
* entirety of the whole document population.
*
* Modified:
* constructors - MoreLikeThis(IndexReader),
* MoreLikeThis(IndexReader, Similarity)
* private method - createQueue(Map<String, Int>)
*
* Added:
* constructors - MoreLikeThis(IndexReader, IndexReader[]),
* MoreLikeThis(IndexReader,
IndexReader[], Similarity)
*
* Notes:
* When invoking method like(int) of this class, you have to pass in the
NORMALIZED document number.
* You can use the same algorithm used in lucene MultiSearcher class,
specifically seen in
* subSearcher(int) and subDoc(int) methods.
> MoreLikeThis supports multiple index readers.
> ---------------------------------------------
>
> Key: LUCENE-4503
> URL: https://issues.apache.org/jira/browse/LUCENE-4503
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Ying Andrews
> Priority: Minor
> Labels: patch
> Attachments: MoreLikeThis.java.patch
>
> Original Estimate: 72h
> Remaining Estimate: 72h
>
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