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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-16500) Do not add any store file on scanner reset that has a seq id greater than current read pt
Date Thu, 25 Aug 2016 10:40:21 GMT
ramkrishna.s.vasudevan created HBASE-16500:
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             Summary: Do not add any store file on scanner reset that has a seq id greater
than current read pt
                 Key: HBASE-16500
                 URL: https://issues.apache.org/jira/browse/HBASE-16500
             Project: HBase
          Issue Type: Improvement
            Reporter: ramkrishna.s.vasudevan
            Assignee: ramkrishna.s.vasudevan
             Fix For: 2.0.0


This in principle is similar to HBASE-15871. 
Take for eg. we have a scanner created with read pt 4. After which a we do a lot of mutations
and then flush the region. 
Now when the scanner reset happens as part of the scan flow we tend to add the the newly flushed
file also to the scanner heap and we keep scanning the file only to see that all the KVs are
having an mvcc greater than the read pt 4. Ideally it is better to skip all of them and not
add in the scanner heap. 




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