Spark

Apache Spark is a lightning-fast cluster computing API based on Scala. Deeper integration with Spark is on the agenda.



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%classpath add mvn org.apache.spark spark-sql_2.11 2.2.1
org.apache.log4j.Logger.getRootLogger().setLevel(org.apache.log4j.Level.ERROR);



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import org.apache.spark.sql.SparkSession

val spark = SparkSession.builder()
                        .appName("Simple Application")
                        .master("local[4]")
                        .config("spark.ui.enabled", "false")
                        .getOrCreate()



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val NUM_SAMPLES = 10000000

val count = spark.sparkContext.parallelize(1 to NUM_SAMPLES).map{i =>
  val x = Math.random()
  val y = Math.random()
  if (x*x + y*y < 1) 1 else 0
}.reduce(_ + _)

println("Pi is roughly " + 4.0 * count / NUM_SAMPLES)



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spark.stop()



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