[jira] Updated: (CASSANDRA-580) vector clock support

["Kelvin Kakugawa (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kelvin Kakugawa updated CASSANDRA-580:
--------------------------------------

    Attachment: 580-interface-1-add-vector-clock.diff

proposed vector clock interface

The vector clock is returned by gets and required for insert/remove.  I assume that server-side conflict resolution will be implemented, so I only pass back the definitive version of the row.  If client-side conflict resolution will be implemented in the future, another data structure will be needed that encapsulates a list of conflicts and, maybe, a summary vector clock to be used for an insert/remove operation that resolves the conflict.

> 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
>
>   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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