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Posted to issues@spark.apache.org by "Lianhui Wang (JIRA)" <ji...@apache.org> on 2016/06/29 18:55:06 UTC

[jira] [Updated] (SPARK-16302) Set the default number of partitions for reading data from a local collection.

     [ https://issues.apache.org/jira/browse/SPARK-16302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lianhui Wang updated SPARK-16302:
---------------------------------
    Summary: Set the default number of partitions for reading data from a local collection.  (was: LocalTableScanExec always use defaultParallelism tasks even though it is very small seq.)

> Set the default number of partitions for reading data from a local collection.
> ------------------------------------------------------------------------------
>
>                 Key: SPARK-16302
>                 URL: https://issues.apache.org/jira/browse/SPARK-16302
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>            Reporter: Lianhui Wang
>
> query: val df = Seq[(Int, Int)]().toDF("key", "value").count it always use defaultParallelism tasks. So i cause run empty or small tasks.



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