Github user mccheah commented on the issue: https://github.com/apache/spark/pull/21238 @andrusha I don't think it's entirely analogous - for the simple reason that the hostPath volumes PR doesn't take into account `SPARK_LOCAL_DIRS`. That environment variable is used to determine the right place for shuffle files. We want to strictly tie that setting to emptydir volumes - and moreover this should be done transparently for the user, i.e. the user shouldn't have to know to provision these volumes to get better performance.
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