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From "Sylvain Lebresne (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-1936) Fit partitioned counter directly into CounterColumn.value
Date Wed, 05 Jan 2011 20:55:46 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12977965#action_12977965
] 

Sylvain Lebresne commented on CASSANDRA-1936:
---------------------------------------------

You're right, don't know what I have smoked. Actually I was still thinking in the context
of 1546, where it's always a replica that 'apply' the update (since the coordinator simply
forward the update to a replica if its not one).

That being said, I do plan to introduce this part 1546, because it allowed to rehabilitate
the consistency levels. So maybe I should do that before, in which case I think the method
here would work.

Still, curious to see your patch. But I'll admit that I was actually happy to get rid of the
updateCommutativeType logic.

> Fit partitioned counter directly into CounterColumn.value 
> ----------------------------------------------------------
>
>                 Key: CASSANDRA-1936
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1936
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Sylvain Lebresne
>            Assignee: Sylvain Lebresne
>             Fix For: 0.8
>
>         Attachments: 0001-Put-partitioned-counter-directly-in-column-value.patch
>
>
> The current implementation of CounterColumn keeps both the partitioned
> counter and the total value of the counter (that is, the sum of the parts of
> the partitioned counter).
> This waste space and this requires the code to keep both representation in
> sync. This ticket propose to remove the total value from the representation
> and to only calculate it when returning the value to the client.
> NOTE: this breaks the on-disk file format (for counters)

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