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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-1072) Increment counters
Date Tue, 10 Aug 2010 19:14:21 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897006#action_12897006
] 

Jonathan Ellis commented on CASSANDRA-1072:
-------------------------------------------

True, you do have to read-before-write for version vectors, but that's a pretty low price
compared to 

 - losing availability if a single node is down
 - a large amount of special-case code for one new op type

I'd very much like to explore the version vector approach in 580 more, before deciding that
we need this extra complexity to achieve reasonable performance.  Because I don't think that
will be necessary.

> Increment counters
> ------------------
>
>                 Key: CASSANDRA-1072
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1072
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: Core
>            Reporter: Johan Oskarsson
>            Assignee: Kelvin Kakugawa
>         Attachments: CASSANDRA-1072-2.patch, CASSANDRA-1072.patch, Incrementcountersdesigndoc.pdf
>
>
> Break out the increment counters out of CASSANDRA-580. Classes are shared between the
two features but without the plain version vector code the changeset becomes smaller and more
manageable.

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