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https://issues.apache.org/jira/browse/HUDI-1045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17842465#comment-17842465
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Vinoth Chandar commented on HUDI-1045:
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h3. [WIP] Approach 1 : Redistribute records from the conflicting file groups
> Support updates during clustering
> ---------------------------------
>
> Key: HUDI-1045
> URL: https://issues.apache.org/jira/browse/HUDI-1045
> Project: Apache Hudi
> Issue Type: Task
> Components: clustering, table-service
> Reporter: leesf
> Assignee: Vinoth Chandar
> Priority: Blocker
> Fix For: 1.0.0
>
>
> We need to allow a writer w writing to file groups f1, f2, f3, concurrently
> while a clustering service C reclusters them into f4, f5.
> * Writes can be either updates, deletes or inserts.
> * Either clustering C or the writer W can finish first
> * Both W and C need to be able to complete their actions without much
> redoing of work.
> * The number of output file groups for C can be higher or lower than input
> file groups.
> * Need to work across and be oblivious to whether the writers are operating
> in OCC or NBCC modes
> * Needs to interplay well with cleaning and compaction services.
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