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https://issues.apache.org/jira/browse/HBASE-1829?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12774841#action_12774841
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stack commented on HBASE-1829:
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I applied TRUNK. Shall I apply all but the tests to 0.20 (The tests won't work
in 0.20 branch). I think it should be fine. The default behavior is
unchanged. Its only if you provide start/stop rows that behavior changes.
> Make use of start/stop row in TableInputFormat
> ----------------------------------------------
>
> Key: HBASE-1829
> URL: https://issues.apache.org/jira/browse/HBASE-1829
> Project: Hadoop HBase
> Issue Type: Improvement
> Components: mapred
> Affects Versions: 0.20.0
> Reporter: Lars George
> Assignee: Lars George
> Fix For: 0.20.2, 0.21.0
>
> Attachments: HBASE-1829-v2.patch, HBASE-1829-v3.patch,
> HBASE-1829-v4.patch, HBASE-1829.patch, HBaseTestingUtility.java,
> TestTableInputFormatScan.java
>
>
> Since we can now specify a start and stop row with the Scan that is handed to
> the TIF we can reduce the splits to the regions that contain these rows. That
> allows to test large MR jobs on a single region for example.
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