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Posted to commits@cassandra.apache.org by "Sergio Bossa (JIRA)" <ji...@apache.org> on 2014/04/17 16:58:15 UTC

[jira] [Updated] (CASSANDRA-7047) TriggerExecutor should group mutations by row key

     [ https://issues.apache.org/jira/browse/CASSANDRA-7047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergio Bossa updated CASSANDRA-7047:
------------------------------------

    Attachment: CASSANDRA-7047.patch

> TriggerExecutor should group mutations by row key
> -------------------------------------------------
>
>                 Key: CASSANDRA-7047
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7047
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Sergio Bossa
>            Assignee: Sergio Bossa
>         Attachments: CASSANDRA-7047.patch
>
>
> TriggerExecutor doesn't currently group mutations returned by triggers even if belonging to the same row key: while harmful per se (at least, I think so), this is definitely a performance problem, because each mutation is a *cluster* mutation, generating more network traffic, more disk IO and more index calls (if present).



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