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Posted to issues@spark.apache.org by "zengrui (Jira)" <ji...@apache.org> on 2019/11/07 14:38:00 UTC

[jira] [Created] (SPARK-29791) Add a spark config to allow user to use executor cores virtually.

zengrui created SPARK-29791:
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             Summary: Add a spark config to allow user to use executor cores virtually.
                 Key: SPARK-29791
                 URL: https://issues.apache.org/jira/browse/SPARK-29791
             Project: Spark
          Issue Type: Improvement
          Components: Scheduler
    Affects Versions: 2.1.0
            Reporter: zengrui


We can config the executor cores by "spark.executor.cores". For example, if we config 8 cores for a executor, then the driver can only scheduler 8 tasks to this executor concurrently. In fact, most cases a task does not always occupy a core or more. More time, tasks spent on disk IO or network IO, so we can make driver to scheduler more than 8 tasks to this executor concurrently, it will make the whole job execute more quickly.



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