Github user mridulm commented on the pull request: https://github.com/apache/spark/pull/2422#issuecomment-56373277 Is there an example of how this is going to be leveraged ? The default case is the simple version delegating to existing spark - would be good to see how this is used against tez - so that there is a clearer picture of how the design changes fit into overall changes proposed : and what further changes (if any) might be required in case we need to generalize the interface. As @pwendell mentioned, currently this aspect is not exposed - and if we want to expose it via an spi, we need to have better understanding of how it will be leveraged. Also, would Experimental make more sense than DeveloperApi (until it stabilizes) ?
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