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https://issues.apache.org/jira/browse/LUCENE-2956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13019827#comment-13019827
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Simon Willnauer commented on LUCENE-2956:
-----------------------------------------
bq. Maybe once LUCENE-2312 sequence ids work for deletes, we can look at
creating a separate branch that implements seq id deletes for all segments, and
compare with the BV approach. Eg, performance, memory usage, and simplicity.
I don't think we need to create a different branch until then DWPT will be no
trunk and we can simply compare to trunk, no?
> Support updateDocument() with DWPTs
> -----------------------------------
>
> Key: LUCENE-2956
> URL: https://issues.apache.org/jira/browse/LUCENE-2956
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Affects Versions: Realtime Branch
> Reporter: Michael Busch
> Assignee: Simon Willnauer
> Priority: Minor
> Fix For: Realtime Branch
>
> Attachments: LUCENE-2956.patch, LUCENE-2956.patch
>
>
> With separate DocumentsWriterPerThreads (DWPT) it can currently happen that
> the delete part of an updateDocument() is flushed and committed separately
> from the corresponding new document.
> We need to make sure that updateDocument() is always an atomic operation from
> a IW.commit() and IW.getReader() perspective. See LUCENE-2324 for more
> details.
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