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Posted to dev@hbase.apache.org by "ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org> on 2016/12/12 06:14:58 UTC

[jira] [Created] (HBASE-17291) Remove ImmutableSegment#getKeyValueScanner

ramkrishna.s.vasudevan created HBASE-17291:
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             Summary: Remove ImmutableSegment#getKeyValueScanner
                 Key: HBASE-17291
                 URL: https://issues.apache.org/jira/browse/HBASE-17291
             Project: HBase
          Issue Type: Improvement
          Components: Scanners
    Affects Versions: 2.0.0
            Reporter: ramkrishna.s.vasudevan
            Assignee: ramkrishna.s.vasudevan
             Fix For: 2.0.0


This is based on a discussion over [~anastas]'s patch. The MemstoreSnapshot uses a KeyValueScanner which actually seems redundant considering we already have a SegmentScanner. The idea is that the snapshot scanner should be a simple iterator type of scanner but it lacks the capability to do the reference counting on that segment that is now used in snapshot. With snapshot having mulitple segments in the latest impl it is better we hold on to the segment by doing ref counting. 



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