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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