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https://issues.apache.org/jira/browse/LUCENE-3736?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13200975#comment-13200975
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Uwe Schindler commented on LUCENE-3736:
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There are som test todos: The tests for parallel readers are very simplistic
and have only 2 documents (which is especially stupid for composite readers to
test them). We should raise number of documents.
> 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
>
>
> 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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