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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4583) Integrate RWCC with Append and Increment operations
Date Sun, 28 Oct 2012 05:31:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13485574#comment-13485574
] 

Lars Hofhansl commented on HBASE-4583:
--------------------------------------

Correctness wise this looks pretty good and it does remove a lot of goofy code.

Please have a careful look, this will impact Increment/Append performance as each increment
will no longer remove the old KVs from the memstore (if it is still found in the memstore).

But it will make it correct w.r.t. version and TTL handling and remove any special status
from Increment and Append.

                
> 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-trunk-radical_v2.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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