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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/12/02 02:46:58 UTC

[jira] [Commented] (SPARK-18679) Regression in file listing performance

    [ https://issues.apache.org/jira/browse/SPARK-18679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15713826#comment-15713826 ] 

Apache Spark commented on SPARK-18679:
--------------------------------------

User 'ericl' has created a pull request for this issue:
https://github.com/apache/spark/pull/16112

> Regression in file listing performance
> --------------------------------------
>
>                 Key: SPARK-18679
>                 URL: https://issues.apache.org/jira/browse/SPARK-18679
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.1.0
>            Reporter: Eric Liang
>            Priority: Blocker
>
> In Spark 2.1 ListingFileCatalog was significantly refactored (and renamed to InMemoryFileIndex).
> It seems there is a performance regression here where we no longer performance listing in parallel for the non-root directory. This forces file listing to be completely serial when resolving datasource tables that are not backed by an external catalog.



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