jiwq commented on issue #1397: MAPREDUCE-7237. Supports config the shuffle's path cache related parameters URL: https://github.com/apache/hadoop/pull/1397#issuecomment-574128605 Thanks @aajisaka for review. > Have you tuned the parameters in your environment? If the answer is yes, is there any positive effect? Yes, it can reduce disk IO. Also, in my opinion it should better can be configured by user, because the default params cannot adjust all situations. > In addition, would you document the new parameters in mapred-default.xml? Added.
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