tooptoop4 edited a comment on issue #27697: [SPARK-27750] Standalone scheduler - ability to prioritize applications over drivers, many drivers act like Denial of Service URL: https://github.com/apache/spark/pull/27697#issuecomment-591523797 @Ngone51 that is worse, one day you could have 10 drivers each taking 1 core, another day you could have 5 drivers each taking 4 cores (in this case if u limited on 10 drivers on both days, all cores would be used on 2nd day). So it does not work well with diff sized drivers. Cores is simple/uniform way. Secondly, if I want to have scheduled scaleup of spark cluster, specifying a portion of cores to not use still works, whereas fixing a max # drivers does not work as it limits ability to take advantage of larger spark cluster
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