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https://issues.apache.org/jira/browse/LUCENE-3736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uwe Schindler updated LUCENE-3736:
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    Attachment: LUCENE-3736.patch

New patch with javadocs and imporved tests (to check all builder setting).

I will commit this later!
                
> ParallelReader is now atomic, add convenience methods to wrap 
> CompositeReaders in either "slow atomic" or "fast composite" way
> ------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-3736
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3736
>             Project: Lucene - Java
>          Issue Type: Sub-task
>          Components: core/index
>            Reporter: Uwe Schindler
>            Assignee: Uwe Schindler
>             Fix For: 4.0
>
>         Attachments: LUCENE-3736.patch, LUCENE-3736.patch, LUCENE-3736.patch
>
>
> ParallelReader is now atomic. We should add a sugar wrapper method to allow 
> synchronized composite readers (with same segment sizes) to be aligned with 
> MultiReaders or wrapped by Slow:
> - one ParallelReader with Slow wrapped parallel readers, they only need same 
> maxDoc() (and deletions)
> - a MultiReader containing all sub-ParallelReaders. This needs 
> CompositeReaders with same docStarts[]

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