Github user jongyoul commented on the pull request:
https://github.com/apache/spark/pull/5063#issuecomment-82694857
@sryza Thanks. Do you think it is reasonable to use `spark.executor.cores`
as mesos executor cores? In fine-grained mode on mesos, each task has its own
cores to be offered, so It's used only the number of cores of executor itself
when executor's status is idle. Simply, if one task is launched on a executor,
the total resources of cores is the sum of `spark.executor.cores` and
`spark.task.cpus`. I think this make configurations confused. What do you think
of it? @elyast Yes, if we use 'spark.executor.cores', we should update docs,
too.
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