IndexWriter.addIndexes can make any incoming segment into CFS if it isn't
already
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Key: LUCENE-3126
URL: https://issues.apache.org/jira/browse/LUCENE-3126
Project: Lucene - Java
Issue Type: Improvement
Components: core/index
Reporter: Shai Erera
Priority: Minor
Fix For: 3.2, 4.0
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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