Github user oscaroboto commented on the pull request:
https://github.com/apache/spark/pull/5096#issuecomment-85610448
hypothetical situation: Lets say we allocated 1 core per executor and the
function within the SparkR lapply called the parallel package mclapply, but
within mclapply we set mc.cores to 4. Would the distributed R code on the
executors be forced to use just one core or would R have the ability of
accessing 4 cores on the executors despite having allocated just 1 core?
(assuming the chip has 4 cores)
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