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https://issues.apache.org/jira/browse/LUCENE-8232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16420861#comment-16420861
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Michael McCandless commented on LUCENE-8232:
--------------------------------------------
+1 for the internal cleanup patch, to pull {{PendingDeletes}} out ofÂ
{{ReaderAndUpdates}}.
> Separate out PendingDeletes from ReadersAndUpdates
> ---------------------------------------------------
>
> Key: LUCENE-8232
> URL: https://issues.apache.org/jira/browse/LUCENE-8232
> Project: Lucene - Core
> Issue Type: Improvement
> Affects Versions: 7.4, master (8.0)
> Reporter: Simon Willnauer
> Priority: Major
> Fix For: 7.4, master (8.0)
>
> Attachments: LUCENE-8232.patch, LUCENE-8232.patch, LUCENE-8232.patch
>
>
> Today ReadersAndUpdates is tightly coupled with IW and all the handling of
> pending deletes. This change decouples IW and pending deletes from
> ReadersAndUpdates and allows expert users to customize how deletes are
> handled. This is useful or up to a certain extend mandatory to work with
> soft-deletes to allow merge policies to make the right decisions.
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