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Posted to issues@spark.apache.org by "Josh Rosen (JIRA)" <ji...@apache.org> on 2014/12/24 02:56:13 UTC

[jira] [Updated] (SPARK-4860) Improve performance of sample() and takeSample() on SchemaRDD

     [ https://issues.apache.org/jira/browse/SPARK-4860?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Josh Rosen updated SPARK-4860:
------------------------------
    Assignee: Ben Cook

> Improve performance of sample() and  takeSample() on SchemaRDD
> --------------------------------------------------------------
>
>                 Key: SPARK-4860
>                 URL: https://issues.apache.org/jira/browse/SPARK-4860
>             Project: Spark
>          Issue Type: Improvement
>          Components: PySpark, SQL
>            Reporter: Davies Liu
>            Assignee: Ben Cook
>             Fix For: 1.3.0
>
>
> In SchemaRDD, all the rows are already serialized into Java objects, so it's possible to call sample()/takeSample() of JavaSchemaRDD() in Python, which will be much faster than the current approach (implemented in pure Python).



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