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From "Gregory Chanan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-7077) checkAndPut should properly integrate with MVCC
Date Wed, 31 Oct 2012 00:56:14 GMT
Gregory Chanan created HBASE-7077:

             Summary: checkAndPut should properly integrate with MVCC
                 Key: HBASE-7077
                 URL: https://issues.apache.org/jira/browse/HBASE-7077
             Project: HBase
          Issue Type: Sub-task
            Reporter: Gregory Chanan
             Fix For: 0.96.0

checkAndPut should integrate with MVCC, similar to how HBASE-4583 fixed appends and increments.

Also need a test, here's one we could use (originally proposed in HBASE-7051):
The current value of some cell is 10.
I issue two concurrent requests:
A) a check and put where check value = 10, put value = 11
B) a put where put value = 50
The only result at the end of these operations that seems reasonable to me is the value of
the cell being 50. If A occurred first (ACID wise), then our values go 10->11->50. If
B occurred first, then our values go 10->50 (and the checkAndPut fails)

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