摘要: combineByKey-->>aggregateByKey-->>foldByKey-->>reduceByKey-->>groupByKey-->>countByKey 0> combineByKey(createCombiner, mergeValue, mergeCombiners, num 阅读全文
posted @ 2019-01-28 18:11 JackSun924 阅读(966) 评论(0) 推荐(0) 编辑