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https://issues.apache.org/jira/browse/SPARK-7825?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen updated SPARK-7825:
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Issue Type: Improvement (was: Bug)
> Poor performance in Cross Product due to no combine operations for small
> files.
> -------------------------------------------------------------------------------
>
> Key: SPARK-7825
> URL: https://issues.apache.org/jira/browse/SPARK-7825
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.2.0, 1.2.1, 1.2.2, 1.3.0, 1.3.1
> Reporter: Tang Yan
>
> Dealing with Cross Product, if one table has many small files, spark sql
> has to handle so many tasks which will lead to poor performance, while Hive
> has a CombineHiveInputFormat which can combine small files to decrease the
> task number.
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