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https://issues.apache.org/jira/browse/PHOENIX-2216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14721381#comment-14721381
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Lars Hofhansl commented on PHOENIX-2216:
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In theory we could open the appropriate HFile (in the reducers, needs to be
after the sort) and write to multiple of them at the same time. In practice I
fear that might be tricky, but it should be doable.
> Support single mapper pass to CSV bulk load table and indexes
> -------------------------------------------------------------
>
> Key: PHOENIX-2216
> URL: https://issues.apache.org/jira/browse/PHOENIX-2216
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
>
> Instead of running separate MR jobs for CSV bulk load: once for the table and
> then once for each secondary index, generate both the data table HFiles and
> the index table(s) HFiles in one mapper phase.
> Not sure if we need HBASE-3727 to be implemented for this or if we can do it
> with existing HBase APIs.
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