[jira] [Resolved] (SPARK-29893) Improve the local reader performance by changing the task number from 1 to multi

["Wenchen Fan (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-29893?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan resolved SPARK-29893.
---------------------------------
    Fix Version/s: 3.0.0
       Resolution: Fixed

Issue resolved by pull request 26516
[https://github.com/apache/spark/pull/26516]

> Improve the local reader performance by changing the task number from 1 to multi
> --------------------------------------------------------------------------------
>
>                 Key: SPARK-29893
>                 URL: https://issues.apache.org/jira/browse/SPARK-29893
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Ke Jia
>            Assignee: Ke Jia
>            Priority: Major
>             Fix For: 3.0.0
>
>
> The currently local reader read all the partition of map stage only using 1 task, which may cause the performance degradation. This PR will improve the performance by using multi tasks instead of one task.



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