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From "Erik Erlandson (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-2991) RDD transforms for scan and scanLeft
Date Tue, 12 Aug 2014 21:00:12 GMT

     [ https://issues.apache.org/jira/browse/SPARK-2991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Erik Erlandson updated SPARK-2991:
----------------------------------

    Issue Type: Sub-task  (was: New Feature)
        Parent: SPARK-2992

> RDD transforms for scan and scanLeft 
> -------------------------------------
>
>                 Key: SPARK-2991
>                 URL: https://issues.apache.org/jira/browse/SPARK-2991
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Spark Core
>            Reporter: Erik Erlandson
>            Assignee: Erik Erlandson
>            Priority: Minor
>              Labels: features
>
> Provide RDD transforms analogous to Scala scan(z)(f) (parallel prefix scan) and scanLeft(z)(f)
(sequential prefix scan)
> Discussion of a scanLeft implementation:
> http://erikerlandson.github.io/blog/2014/08/09/implementing-an-rdd-scanleft-transform-with-cascade-rdds/
> Discussion of scan:
> http://erikerlandson.github.io/blog/2014/08/12/implementing-parallel-prefix-scan-as-a-spark-rdd-transform/



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