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From "Michael McCandless (JIRA)" <>
Subject [jira] [Commented] (LUCENE-7671) Enhance UpgradeIndexMergePolicy with additional options
Date Sun, 02 Apr 2017 19:52:41 GMT


Michael McCandless commented on LUCENE-7671:

Hi [~k317h], thank you.  To fix the failing test, can you change it to use the version of
{{IndexWriter.addIndexes}} that takes {{CodecReader[]}} instead?  This should have the same
effect (some old, some new segments in one index).

> Enhance UpgradeIndexMergePolicy with additional options
> -------------------------------------------------------
>                 Key: LUCENE-7671
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Keith Laban
> Enhance UpgradeIndexMergePolicy to be a MergePolicy that can be used outside the scope
the IndexUpgrader.
> The enhancement aims to allow the UpgradeIndexMergePolicy to:
> 1) Delegate normal force merges to the underlying merge policy
> 2) Enable a flag that will explicitly tell UpgradeIndexMergePolicy when it should start
looking for upgrades.
> 3) Allow new segments to be considered to be merged with old segments, depending on underlying
> 4) Be configurable for backwards compatibility such that only segments needing an upgrade
would be considered when merging, no explicit upgrades.

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