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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2019/05/21 04:16:22 UTC

[jira] [Resolved] (SPARK-19854) Refactor file partitioning strategy to make it easier to extend / unit test

     [ https://issues.apache.org/jira/browse/SPARK-19854?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon resolved SPARK-19854.
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    Resolution: Incomplete

> Refactor file partitioning strategy to make it easier to extend / unit test
> ---------------------------------------------------------------------------
>
>                 Key: SPARK-19854
>                 URL: https://issues.apache.org/jira/browse/SPARK-19854
>             Project: Spark
>          Issue Type: New Feature
>          Components: SQL
>    Affects Versions: 2.1.0
>            Reporter: Reynold Xin
>            Assignee: Reynold Xin
>            Priority: Major
>              Labels: bulk-closed
>
> The way we currently do file partitioning strategy is hard coded in FileSourceScanExec. This is not ideal for two reasons:
> 1. It is difficult to unit test the default strategy. In order to test this, we need to do almost end-to-end tests by creating actual files on the file system.
> 2. It is difficult to experiment with different partitioning strategies without adding a lot of if branches.
> The goal of this story is to create an internal interface for this so we can make this pluggable for both better testing and experimentation.



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