Hi all, The size of shuffle write showing in spark web UI is mush different when I execute same spark job on same input data(100GB) in both spark 1.1 and spark 1.2. At the same sortBy stage, the size of shuffle write is 39.7GB in spark 1.1 but 91.0GB in spark 1.2. I set spark.shuffle.manager option to hash because it's default value is changed but spark 1.2 writes larger file than spark 1.1. Can anyone tell me why this happened?
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