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主要想回答兩個問題: map端(shuffle-write)如何對數(shù)據(jù)進行分片? reduce端(shuffle-read)如何讀取數(shù)據(jù)蹲嚣? Sh...
Spark內(nèi)部有兩大類操作,Transformation和Action;Transformation又分窄依賴操作和寬依賴操作,區(qū)分這兩種操作的...
CoarseGrainedSchedulerBackend 以 spark.scheduler.revive.interval 默認1s調(diào)用ma...