Spark 算子

0.parallelize

1.map

2.mapValues

3.flatMap

4.mapPartitions

5.mapPartitionsWithIndex

6.filter

7.reduce

8.reduceByKey

9.groupBy

10.groupByKey

11.partitionBy

12.foreach

13.foreachPartition

14.count

15.collect

16.saveAsTextFile

17.combineByKey

18.persist

19.cache

20.sample

21.union

22.join

23.cartesian

24.textFile

25.makeRDD

26.distinct