Spark中Shuffle的前世今生

1.Shuffle的变迁 Spark 0.8及以前 Hash Based Shuffle Spark 0.8.1 为Hash Based Shuffle引入File Consolidation机制 Spark 0.9 引入ExternalAppendOnlyMap Spark 1.1 引入Sort Based Shuffle,但默认仍为Hash Based Shuffle Spark 1.2 默认
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