[
https://issues.apache.org/jira/browse/SPARK-19091?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Hyukjin Kwon resolved SPARK-19091.
----------------------------------
Resolution: Incomplete
> createDataset(sc.parallelize(x: Seq)) should be equivalent to
> createDataset(x: Seq)
> -----------------------------------------------------------------------------------
>
> Key: SPARK-19091
> URL: https://issues.apache.org/jira/browse/SPARK-19091
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Josh Rosen
> Priority: Major
> Labels: bulk-closed
>
> It turns out that spark.createDataset(sc.parallelize(x: Seq)) and
> spark.createaDataSet(x: Seq) produce different plans, where the former is
> much less efficient due to a lack of accurate size estimation. We should
> modify SparkSession to special-case the situation where createDataset is
> called on a ParallelCollectionRDD in order to remove this source of
> performance variation between the two plans.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
