Spark生态之Alluxio学习2---Spark从tachyon中读取文件

1.启动spark-shell

2.上传文件到tachyon：

xubo@xubo:~/cloud/test/tachyon$ ../../tachyon-0.7.1/bin/tachyon tfs copyFromLocal 1.txt /
Copied 1.txt to /
xubo@xubo:~/cloud/test/tachyon$ ../../tachyon-0.7.1/bin/tachyon tfs cat /1.txt
hello tachyon
1
2
3

3.读取：

scala> val text1= sc.textFile("tachyon://localhost:19998/1.txt")
text1: org.apache.spark.rdd.RDD[String] = MapPartitionsRDD[1] at textFile at :21

scala> text
text1   text    

scala> text1.foreach
foreach            foreachPartition   foreachWith        

scala> text1.foreach
                                  def foreach(f: T => Unit): Unit   

scala> text1.foreach(println)
1
hello tachyon
2
3