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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2020/05/01 16:52:02 UTC
[jira] [Assigned] (SPARK-29791) Add a spark config to allow user to
use executor cores virtually.
[ https://issues.apache.org/jira/browse/SPARK-29791?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-29791:
------------------------------------
Assignee: Apache Spark
> 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
> Assignee: Apache Spark
> Priority: Minor
> Attachments: 0001-add-implementation-for-issue-SPARK-29791.patch
>
>
> 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(virtual the cores to 16，32 or more the executor report to driver) to this executor concurrently, it will make the whole job execute more quickly.
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