sample
package sparkcore
import org.apache.spark.rdd.RDD
import org.apache.spark.{SparkConf, SparkContext}
object Demo05Sample {
def main(args: Array[String]): Unit = {
val conf: SparkConf = new SparkConf().setAppName("Sample").setMaster("local")
val sc = new SparkContext(conf)
val students: RDD[String] = sc.textFile("data/students.txt")
/**
* sample:抽样算子
*/
val sampleRDD: RDD[String] = students.sample(false,0.1)
sampleRDD.foreach(println)
}
}