[jira] [Commented] (LUCENE-7671) Enhance UpgradeIndexMergePolicy with additional options

["Keith Laban (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-7671?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15925000#comment-15925000 ] 

Keith Laban commented on LUCENE-7671:
-------------------------------------

Rebased with master to keep up-to-date. [~mikemccand] did you ever have an opportunity to review my previous post?

> Enhance UpgradeIndexMergePolicy with additional options
> -------------------------------------------------------
>
>                 Key: LUCENE-7671
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7671
>             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 MergePolicy.
> 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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