Enis Soztutar created HBASE-8763:
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Summary: [BRAINSTORM] Combine MVCC and SeqId
Key: HBASE-8763
URL: https://issues.apache.org/jira/browse/HBASE-8763
Project: HBase
Issue Type: Improvement
Components: regionserver
Reporter: Enis Soztutar
Fix For: 0.98.0
HBASE-8701 and a lot of recent issues include good discussions about mvcc +
seqId semantics. It seems that having mvcc and the seqId complicates the
comparator semantics a lot in regards to flush + WAL replay + compactions +
delete markers and out of order puts.
Thinking more about it I don't think we need a MVCC write number which is
different than the seqId. We can keep the MVCC semantics, read point and
smallest read points intact, but combine mvcc write number and seqId. This will
allow cleaner semantics + implementation + smaller data files.
We can do some brainstorming for 0.98. We still have to verify that this would
be semantically correct, it should be so by my current understanding.
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