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https://issues.apache.org/jira/browse/HBASE-1605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12726598#action_12726598
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Jonathan Gray commented on HBASE-1605:
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I think I understand what you're saying now Chris.
But what you want is a distributed Filter? To be able to properly limit (from
the start, I assume?) you need to sequentially scan. So a single mapper would
make this work.
Can you clarify what exactly the behavior you're looking for is? You want the
first N rows from the table? Or you want the first N rows from each region of
the table?
> TableInputFormat should support 'limit'
> ---------------------------------------
>
> Key: HBASE-1605
> URL: https://issues.apache.org/jira/browse/HBASE-1605
> Project: Hadoop HBase
> Issue Type: Improvement
> Components: mapred
> Reporter: Chris K Wensel
>
> Would be useful if TableInputFormat could be passed a 'limit' property value
> that limited the total result set to the value of 'limit'.
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