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https://issues.apache.org/jira/browse/CASSANDRA-580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12889681#action_12889681
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Johan Oskarsson commented on CASSANDRA-580:
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CASSANDRA-1243 was my somewhat failed attempt to split out code from 
CASSANDRA-1072 to make that patch more manageable, but there is not really a 
clear cut component to split out so I have canceled that patch. I can close it 
for now and reopen if we want to try again. Alternatively create a few smaller 
and more focused issues instead. It won't make much of a dent in 1072 though.

The idea is to get CASSANDRA-1072 committed first and then resume work on 
CASSANDRA-580. They do both use a lot of the same changes that we have already 
committed to Cassandra (clocks, reconciler) and probably share a bit of code 
still.



> vector clock support
> --------------------
>
>                 Key: CASSANDRA-580
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-580
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>         Environment: N/A
>            Reporter: Kelvin Kakugawa
>            Assignee: Kelvin Kakugawa
>             Fix For: 0.7
>
>         Attachments: 580-1-Add-ColumnType-as-enum.patch, 
> 580-context-v4.patch, 580-counts-wip1.patch, 580-thrift-v3.patch, 
> 580-thrift-v6.patch, 580-version-vector-wip.patch
>
>   Original Estimate: 672h
>  Remaining Estimate: 672h
>
> Allow a ColumnFamily to be versioned via vector clocks, instead of long 
> timestamps.  Purpose: enable incr/decr; flexible conflict resolution.

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