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Posted to dev@lucene.apache.org by "Ryan Ernst (JIRA)" <ji...@apache.org> on 2014/09/24 22:43:33 UTC

[jira] [Created] (LUCENE-5976) Index upgrader should have option to do multiple segments instead of one

Ryan Ernst created LUCENE-5976:
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             Summary: Index upgrader should have option to do multiple segments instead of one
                 Key: LUCENE-5976
                 URL: https://issues.apache.org/jira/browse/LUCENE-5976
             Project: Lucene - Core
          Issue Type: New Feature
            Reporter: Ryan Ernst


Right now, index upgrader produces one gigantic segment.  This can take a long time, consume more memory than normal merges, and even sidestep the max seg size for the delegated MergePolicy.

It would be nice to have a simpler option: create 1 upgraded segment for every existing segment.  If there are deletes that are merged away, the regulard MP can takeover after the upgrade is complete (or even partially complete) to merge away deletes.



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