Duo Zhang created HBASE-17168:
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             Summary: Use a cell as the start point of a scan internally
                 Key: HBASE-17168
                 URL: https://issues.apache.org/jira/browse/HBASE-17168
             Project: HBase
          Issue Type: Sub-task
            Reporter: Duo Zhang


Mainly for restart a scan when error. For now, the logic for reverse scan is 
not stable. You can see the ConnectionUtils.createClosestRowBefore. we just 
append some 0xFF to the end of a key. This works for most time but 
theoretically we could have a row between the given row and the 'closest row 
before'.

So here I propose we use a cell as the start point of a scan internally as we 
can use createFirstOnRow or createLastOnRow to bettr control the restart point.



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