Shai Erera created LUCENE-5883:
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Summary: Move MergePolicy to LiveIndexWriterConfig
Key: LUCENE-5883
URL: https://issues.apache.org/jira/browse/LUCENE-5883
Project: Lucene - Core
Issue Type: Improvement
Components: core/index
Reporter: Shai Erera
Assignee: Shai Erera
Since LUCENE-5711, MergePolicy is no longer wired to an IndexWriter instance.
Therefore it can be moved to be a live setting on IndexWriter, which will allow
apps to plug-in an MP on a live IW instance, without closing/reopening the
writer. See for example LUCENE-5526 - instead of adding MP to forceMerge, apps
could change the MP before calling forceMerge, with e.g. an
UpgradeIndexMergePolicy.
I think we can also make MergeScheduler a live setting, though I currently
don't see the benefits of doing that, so I'd rather not touch it now.
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