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https://issues.apache.org/jira/browse/HBASE-4583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13489827#comment-13489827
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Varun Sharma commented on HBASE-4583:
-------------------------------------
Hi folks,
Firstly, awesome to have this patch. Thanks, lars and everyone.
We have been trying to build a consistent application on top of hbase which
also works well with counters - consider a user and all his liked "pins" or
"tweets". Row is User Id and liked pins are column qualifiers. Also, there is a
column maintaining the "count". For maintaining consistent data, it would be
nice if we could do the following - write a like and increment the count and
delete a like and decrement the count.
I am wondering if we can now couple "put(s)" and "increment(s)" or "delete(s)"
and "decrement(s)" from the client side, as part of a single row mutation and
ensure a consistent table view for the user in the above application (it will
be of course be a separate JIRA, though).
Thanks
Varun
> 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: 0.96.0
>
> Attachments: 4583-trunk-less-radical.txt,
> 4583-trunk-less-radical-v2.txt, 4583-trunk-less-radical-v3.txt,
> 4583-trunk-less-radical-v4.txt, 4583-trunk-less-radical-v5.txt,
> 4583-trunk-less-radical-v6.txt, 4583-trunk-radical.txt,
> 4583-trunk-radical_v2.txt, 4583-trunk-v3.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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