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https://issues.apache.org/jira/browse/LUCENE-3918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13591739#comment-13591739
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Shai Erera commented on LUCENE-3918:
------------------------------------

bq. the slowwrapping in the sortingatomicreader must be removed before 
committing as well.

How? This utility sorts an entire index ... it doesn't work per-segment. The 
old2New mapping is a global mapping.
I thought about this, but I didn't see any real choice. I.e., even if we sort 
each segment separately, we'd still need to sort the index globally (see my 
comment about the online sorting).

If u have an idea how it can be per-segment, I'll be happy to hear.
                
> Port index sorter to trunk APIs
> -------------------------------
>
>                 Key: LUCENE-3918
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3918
>             Project: Lucene - Core
>          Issue Type: Task
>          Components: modules/other
>    Affects Versions: 4.0-ALPHA
>            Reporter: Robert Muir
>             Fix For: 4.2, 5.0
>
>         Attachments: LUCENE-3918.patch, LUCENE-3918.patch, LUCENE-3918.patch, 
> LUCENE-3918.patch, LUCENE-3918.patch, LUCENE-3918.patch, LUCENE-3918.patch
>
>
> LUCENE-2482 added an IndexSorter to 3.x, but we need to port this
> functionality to 4.0 apis.

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