Github user CodingCat commented on the pull request: https://github.com/apache/incubator-spark/pull/626#issuecomment-35761128 I run the following command scala> val a = sc.textFile("/Users/nanzhu/code/incubator-spark/LICENSE", 4).map(line => ("a", "b")) scala> val a = sc.textFile("/Users/nanzhu/code/incubator-spark/LICENSE", 2).map(line => ("a", "b")) Sorry, uploaded the wrong image, look at here 
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