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https://issues.apache.org/jira/browse/LUCENE-3126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13038618#comment-13038618
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Michael McCandless commented on LUCENE-3126:
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Patch looks good!
Maybe we should add asserts to SegmentMerger.createCompoundFile, that
SI.files() did not return del/separate norms? I don't like the ambiguity
here... and then strengthen the comment saying SI.files should never return
these in this context? Hopefully this does not cause any test files! (We can
do this as a separate issue...).
> IndexWriter.addIndexes can make any incoming segment into CFS if it isn't
> already
> ---------------------------------------------------------------------------------
>
> Key: LUCENE-3126
> URL: https://issues.apache.org/jira/browse/LUCENE-3126
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/index
> Reporter: Shai Erera
> Assignee: Shai Erera
> Priority: Minor
> Fix For: 3.2, 4.0
>
> Attachments: LUCENE-3126.patch, LUCENE-3126.patch
>
>
> Today, IW.addIndexes(Directory) does not modify the CFS-mode of the incoming
> segments. However, if IndexWriter's MP wants to create CFS (in general),
> there's no reason why not turn the incoming non-CFS segments into CFS. We
> anyway copy them, and if MP is not against CFS, we should create a CFS out of
> them.
> Will need to use CFW, not sure it's ready for that w/ current API (I'll need
> to check), but luckily we're allowed to change it (@lucene.internal).
> This should be done, IMO, even if the incoming segment is large (i.e., passes
> MP.noCFSRatio) b/c like I wrote above, we anyway copy it. However, if you
> think otherwise, speak up :).
> I'll take a look at this in the next few days.
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