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Posted to issues@spark.apache.org by "Erik Erlandson (JIRA)" <ji...@apache.org> on 2014/08/12 21:09:12 UTC

[jira] [Created] (SPARK-2991) RDD transforms for scan and scanLeft

Erik Erlandson created SPARK-2991:
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             Summary: RDD transforms for scan and scanLeft 
                 Key: SPARK-2991
                 URL: https://issues.apache.org/jira/browse/SPARK-2991
             Project: Spark
          Issue Type: New Feature
          Components: Spark Core
            Reporter: Erik Erlandson
            Priority: Minor


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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