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Posted to issues@spark.apache.org by "Ke Jia (Jira)" <ji...@apache.org> on 2019/11/14 09:46:00 UTC

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

Ke Jia created SPARK-29893:
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             Summary: 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


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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