import org.apache.spark.api.java.function.PairFunction; import org.apache.spark.api.java.function.VoidFunction; import scala.Tuple2; public class WordCountLocal { public static void main(String[] args) { //第一步:创建conf对象。 SparkConf conf = new SparkConf() .setAppName("wordcount") .se...
a runtime instance of Apache Spark will be started and once the program has done executing, it will be shutdown. Finally, to understand all the JARs which are added to the project when we added this dependency, we can run a simple Maven...
step1、进入spark-shellstep2、scala>sc.setCheckpointDir("hdfs://bigdata121:9000... found: value rdd rdd.checkpoint ^scala> rdd1.checkpoint step4: 再次统计行数scala> rdd1.count Spark的HA /module/spark-2.1.0/conf/ step3: 先停止所有的 ,然后启动bigdata121,bigdata122 这是启动121,122同理 这...
使用Scala 写WordContext程序 mydemoimportorg.apache.spark.{SparkConf,SparkContext}objectMyWordContextDemo{defmain(args:Array[String]):Unit={// 创建一个 Configvalconf=newSparkConf().setAppName("MyWordContext")// 创建 SparkContext 对象valsc=newSparkContext(conf)// 使用sc 对象执行相应的算子sc.tex...
val sqlCtx =neworg.apache.spark.sql.SQLContext(sc)importsqlContext.implicits._ // 读取hdfs 数据源,格式如下:以空格隔开,最后一列数字列是分析标题后,人为打上的标签, 值是按照情绪程度,值选择于【-1,-0.75,-0.5,-0.25,,0.25,0.50,0.75,1】其中之一。
spark-submit.sh summary Aug 15, 2017 w2v.scala summary Aug 15, 2017 w2v_visualizer.py update Oct 25, 2018 View all files README spark word2vec train word2vec on spark and save as text file(google word2vec format ) 使用spark训练word2vec,由于spark保存的模型只能在spark上使用,本工程将spa...
Scala: importorg.apache.spark.ml.feature.Word2Vec// Input data: Each row is a bag of words from a sentence or document.val documentDF=spark.createDataFrame(Seq("Hi I heard about Spark".split(" "),"I wish Java could use case classes".split(" "),"Logistic regression models are neat...
Spark提供内存计算,把计算的中间结果放到内存中,高效提高迭代计算 Spark是基于有向无环图DAG的任务调度机制(好于MapReduce的执行机制),流水线优化,使得很多数据可以一条线地执行下去,不用落磁盘进行读写,可以大大加快执行速度 Q:Spark会取代Hadoop吗? Hadoop有两大核心:存储框架HDFS(分布式文件系统)、分布式计算框架Ma...
$realtobits $recovery $recrem $removal $reset $reset_count $reset_value $restart $rewind $right $root $rose $rtoi $sampled $save $scale $scope $sdf_annotate $set_coverage_db_name $setup $setuphold $sformat $shortrealtobits $showscopes $showvariables $showvars $signed $size...
16/04/06 12:06:35 INFO SparkContext: Created broadcast 6 from broadcast at Word2Vec.scala:292 Exception in thread "main" java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:3236) at java.io.ByteArrayOutputStream.grow(ByteArrayOutputStream.java:118) at java...