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https://issues.apache.org/jira/browse/HBASE-4583?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lars Hofhansl updated HBASE-4583:
---------------------------------
Attachment: 4583-trunk-radical.txt
Here's a pretty radical change!
It remove Memstore.upsert completely along with all callers and all tests that
testing this functionality.
Note that while upsert is no longer needed for *correctness* (it used to set
the memstoreTS to 0 so that other increments/appends would be guaranteed to see
the previous values), it was still a potential performance improvement because
stale KVs were removed immediately.
However, this actually violated the HBase VERSIONS contract.
TestAtomicOperation.testIncrementMultiThreads is not measurably slower on my
machine.
> Integrate RWCC with Append and Increment operations
> ---------------------------------------------------
>
> Key: HBASE-4583
> URL: https://issues.apache.org/jira/browse/HBASE-4583
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Fix For: 0.94.3, 0.96.0
>
> Attachments: 4583-trunk-radical.txt, 4583.txt, 4583-v2.txt,
> 4583-v3.txt, 4583-v4.txt
>
>
> Currently Increment and Append operations do not work with RWCC and hence a
> client could see the results of multiple such operation mixed in the same
> Get/Scan.
> The semantics might be a bit more interesting here as upsert adds and removes
> to and from the memstore.
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