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Posted to issues@spark.apache.org by "Anirudh Ramanathan (JIRA)" <ji...@apache.org> on 2018/01/31 14:24:00 UTC

[jira] [Created] (SPARK-23285) Allow spark.executor.cores to be fractional

Anirudh Ramanathan created SPARK-23285:
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             Summary: Allow spark.executor.cores to be fractional
                 Key: SPARK-23285
                 URL: https://issues.apache.org/jira/browse/SPARK-23285
             Project: Spark
          Issue Type: Improvement
          Components: Kubernetes, Scheduler, Spark Submit
    Affects Versions: 2.4.0
            Reporter: Anirudh Ramanathan


There is a strong check for an integral number of cores per executor in [https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/deploy/SparkSubmitArguments.scala#L270-L272.] Given we're reusing that property in K8s, does it make sense to relax it?

 

K8s treats CPU as a "compressible resource" and can actually assign millicpus to individual containers. Also to be noted - spark.driver.cores has no such check in place.



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