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https://issues.apache.org/jira/browse/LUCENE-5895?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14120401#comment-14120401
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ASF subversion and git services commented on LUCENE-5895:
---------------------------------------------------------
Commit 1622352 from [~mikemccand] in branch 'dev/branches/branch_4x'
[ https://svn.apache.org/r1622352 ]
LUCENE-5895: fix bug (when 2nd long from xorshift was negative) causing ids to
be prefixed by 16 0s
> Add per-segment and per-commit id to help replication
> -----------------------------------------------------
>
> Key: LUCENE-5895
> URL: https://issues.apache.org/jira/browse/LUCENE-5895
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 5.0, 4.11
>
> Attachments: LUCENE-5895.patch, LUCENE-5895.patch
>
>
> It would be useful if Lucene recorded a unique id for each segment written
> and each commit point. This way, file-based replicators can use this to
> "know" whether the segment/commit they are looking at on a source machine and
> dest machine are in fact that same.
> I know this would have been very useful when I was playing with NRT
> replication (LUCENE-5438).
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