You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@spark.apache.org by "Josh Rosen (JIRA)" <ji...@apache.org> on 2015/08/26 23:38:45 UTC
[jira] [Created] (SPARK-10303) Spark SQL JSON Reader uses
inefficient form of Union operation
Josh Rosen created SPARK-10303:
----------------------------------
Summary: Spark SQL JSON Reader uses inefficient form of Union operation
Key: SPARK-10303
URL: https://issues.apache.org/jira/browse/SPARK-10303
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 1.5.0
Reporter: Josh Rosen
Attachments: screenshot-1.png
See attached screenshot. For a job that uses SQLContext's JSON reader, the RDD DAG visualization shows that Spark is using an inefficient version of Union which chains together many UnionRDDs as opposed to the more-efficient form of UnionRDD that accepts a larger list of child RDDs.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org