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https://issues.apache.org/jira/browse/SPARK-9775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16522064#comment-16522064
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Maxim Gekk commented on SPARK-9775:
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Please, change another related methods like proposed in the PR:
https://github.com/apache/spark/pull/21589
> Query Mesos for number of CPUs to set default parallelism
> ---------------------------------------------------------
>
> Key: SPARK-9775
> URL: https://issues.apache.org/jira/browse/SPARK-9775
> Project: Spark
> Issue Type: Improvement
> Components: Mesos
> Affects Versions: 1.4.1
> Reporter: Peder Ås
> Priority: Minor
>
> As highlighted in a TODO on line 400 of MesosSchedulerBackend.scala (at least
> on 3ca995b7) we should query the Mesos master and set the default parallelism
> based on the number of CPUs available in the cluster (and multiply by two or
> three?)
> See code in question [here
> (gitweb)|https://git-wip-us.apache.org/repos/asf?p=spark.git;a=blob;f=core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala;h=3f63ec1c;hb=HEAD#l400].
> This task should also update the documentation [here
> (gitweb)|https://git-wip-us.apache.org/repos/asf?p=spark.git;a=blob;f=docs/configuration.md;h=c60dd1;hb=HEAD#l789]
> to highlight the fact.
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