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https://issues.apache.org/jira/browse/CASSANDRA-580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12784498#action_12784498
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Jonathan Ellis commented on CASSANDRA-580:
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... but shouldn't that timestamp be internal to the server?  we definitely 
don't want the client to specify what amounts to an implementation detail, and 
i don't think there is any reason to send it to the client on a read, either.

> 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
>         Attachments: 580-interface-1-add-vector-clock.diff, 
> 580-interface-2-add-vector-clock.diff, 580-thrift-v3.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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