OneToOneDependency 一对一依赖关系

OneToOneDependency 一对一依赖关系

• Represents a one-to-one dependency between partitions of the parent and child RDDs.

更多资源

• github: https://github.com/opensourceteams/spark-scala-maven
• csdn(汇总视频在线看): https://blog.csdn.net/thinktothings/article/details/84726769

youtub视频演示

• https://youtu.be/Tohv00GJ5AQ(youtube视频)
• https://www.bilibili.com/video/av37442139/(bilibili视频)

输入数据

a bc
a  

处理程序scala

package com.opensource.bigdata.spark.local.rdd.operation.dependency.narrow.n_02_RangeDependency

import com.opensource.bigdata.spark.local.rdd.operation.base.BaseScalaSparkContext

object Run1 extends BaseScalaSparkContext{

  def main(args: Array[String]): Unit = {
    val sc = pre()
    val rdd1 = sc.textFile("/opt/data/2/c.txt",2)

    println(rdd1.collect().mkString("\n"))

    //rdd1.partitions(0).asInstanceOf[org.apache.spark.rdd.HadoopPartition]

    sc.stop()
  }

}

数据处理图