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![cd spark-1.4.1-bin-hadoop2.6 spark-1.4.1-bin-hadoop2.6 $ ./bin/spark-shell --master local[2] The --master option specifies the master URL for a distributed cluster, or local to run locally with one thread, or local[N] to run locally with N threads.](https://image.slidesharecdn.com/reactivedashboardsusingapachespark-150819153013-lva1-app6891/75/Reactive-dashboard-s-using-apache-spark-23-2048.jpg)
![● Simple SBT project setup https://github.com/rahulkumar-‐aws/HelloWorld $ mkdir HelloWorld $ cd HelloWorld $ mkdir -p src/main/scala $ mkdir -p src/main/resources $ mkdir -p src/test/scala $ vim build.sbt name := “HelloWorld” version := “1.0” scalaVersion := “2.10.4” $ mkdir project $ cd project $ vim build.properties sbt.version=0.13.8 $ vim scr/main/scala/HelloWorld.scala object HelloWorld { def main(args: Array[String]) = println("HelloWorld!") } $ sbt run](https://image.slidesharecdn.com/reactivedashboardsusingapachespark-150819153013-lva1-app6891/75/Reactive-dashboard-s-using-apache-spark-27-2048.jpg)
![First Spark Application $git clone https://github.com/rahulkumar-aws/WordCount.git import org.apache.spark.SparkContext import org.apache.spark.SparkContext._ object SparkWordCount { def main(args: Array[String]): Unit = { val sc = new SparkContext("local","SparkWordCount") val wordsCounted = sc.textFile(args(0)).map(line=> line.toLowerCase) .flatMap(line => line.split("""W+""")) .groupBy(word => word) .map{ case(word, group) => (word, group.size)} wordsCounted.saveAsTextFile(args(1)) sc.stop() } } $sbt "run-main ScalaWordCount src/main/resources/sherlockholmes.txt out"](https://image.slidesharecdn.com/reactivedashboardsusingapachespark-150819153013-lva1-app6891/75/Reactive-dashboard-s-using-apache-spark-28-2048.jpg)
![Spark Cache Introduction Spark supports pulling data sets into a cluster-wide in-memory cache. scala> val textFile = sc.textFile("README.md") textFile: org.apache.spark.rdd.RDD[String] = MapPartitionsRDD[12] at textFile at <console>:21 scala> val linesWithSpark = textFile.filter(line => line.contains("Spark")) linesWithSpark: org.apache.spark.rdd.RDD[String] = MapPartitionsRDD[13] at filter at <console>:23 scala> linesWithSpark.cache() res11: linesWithSpark.type = MapPartitionsRDD[13] at filter at <console>:23 scala> linesWithSpark.count() res12: Long = 19](https://image.slidesharecdn.com/reactivedashboardsusingapachespark-150819153013-lva1-app6891/75/Reactive-dashboard-s-using-apache-spark-31-2048.jpg)
Uploaded byRahul Kumar
Reactive dashboard’s using apache spark
Rahul Kumar's presentation at LinuxCon 2015 covers the creation of reactive dashboards using Apache Spark, detailing key features like real-time data updates and interactivity. It provides an overview of Spark's capabilities, RDDs (Resilient Distributed Datasets), and Spark SQL for structured data, along with practical examples and setup instructions. The session emphasizes building responsive and resilient applications through reactive programming with tools like Play Framework and Akka.
Reactive dashboard’s using apache spark
- 1. Reactive Dashboards Using ApacheSpark Rahul Kumar Software Developer @rahul_kumar_aws LinuxCon, CloudOpen, ContainerCon North America 2015
- 2. Agenda • Dashboards • BigData Introduction • Apache Spark • Introduction to Reactive Applications • Reactive Platform • Live Demo
- 3. Dashboards A dashboard isa visual display of the most important information needed to achieve one or more objectives; consolidated and arranged on a single screen so the information can be monitored at a glance*. * Stephen Few’s definition of a dashboard
- 4. Key characteristics ofa dashboard •All component should fit in a single screen •Interactivity such as filtering, drill down can be used. •The displayed data automatically updated without any assistance from the user. 4
- 5. 5* image sourcegoogle image search Google Analytics
- 6. 6* image sourcegoogle image search AWS CloudWatch
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- 8. A typical databaseapplication
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- 10. Three V’s ofBig Data
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- 13. Apache Apache Spark isa fast and general engine for large-scale data processing. Speed Easy to Use Generality Runs Everywhere
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- 18. • Apache SparkSetup • Interaction with Spark Shell • Setup a Spark App • RDD Introduction • Deploy Spark app on Cluster
- 19. Prerequisite for clustersetup Spark runs on Java 6+, Python 2.6+ and R 3.1+. For the Scala API, Spark 1.4.1 uses Scala 2.10. Java 8 sudo add-apt-repository ppa:webupd8team/java $ sudo apt-get update $ sudo apt-get install oracle-java8-installer Scala 1.10.4 http://www.scala-lang.org/files/archive/scala-2.10.4.tgz $tar -xvzf scala-2.10.4.tgz vim ~/.bashrc export SCALA_HOME=/home/ubuntu/scala-2.10.4 export PATH=$PATH:$SCALA_HOME/bin Spark Cluster
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- 22. Running Spark Example& Shell $ cd spark-1.4.1-bin-hadoop2.6 $./bin/run-example SparkPi 10
- 23. cd spark-1.4.1-bin-hadoop2.6 spark-1.4.1-bin-hadoop2.6 $./bin/spark-shell --master local[2] The --master option specifies the master URL for a distributed cluster, or local to run locally with one thread, or local[N] to run locally with N threads.
- 25. RDD Introduction Resilient Distributed Data Set ResilientDistributed Datasets (RDDs), a distributed memory abstraction that lets programmers perform in-memory computations on large clusters in a fault-tolerant manner. RDD shard the data over a cluster, like a virtualized, distributed collection. Users create RDDs in two ways: by loading an external dataset, or by distributing a collection of objects such as List, Map etc.
- 26. RDD Operations RDDs supporttwo types of operations: transformations and actions. Spark computes RDD only in a lazy fashion. Only computation start when an Action call on RDD.
- 27. ● Simple SBTproject setup https://github.com/rahulkumar-‐aws/HelloWorld $ mkdir HelloWorld $ cd HelloWorld $ mkdir -p src/main/scala $ mkdir -p src/main/resources $ mkdir -p src/test/scala $ vim build.sbt name := “HelloWorld” version := “1.0” scalaVersion := “2.10.4” $ mkdir project $ cd project $ vim build.properties sbt.version=0.13.8 $ vim scr/main/scala/HelloWorld.scala object HelloWorld { def main(args: Array[String]) = println("HelloWorld!") } $ sbt run
- 28. First Spark Application $gitclone https://github.com/rahulkumar-aws/WordCount.git import org.apache.spark.SparkContext import org.apache.spark.SparkContext._ object SparkWordCount { def main(args: Array[String]): Unit = { val sc = new SparkContext("local","SparkWordCount") val wordsCounted = sc.textFile(args(0)).map(line=> line.toLowerCase) .flatMap(line => line.split("""W+""")) .groupBy(word => word) .map{ case(word, group) => (word, group.size)} wordsCounted.saveAsTextFile(args(1)) sc.stop() } } $sbt "run-main ScalaWordCount src/main/resources/sherlockholmes.txt out"
- 29. Launching Spark onCluster
- 31. Spark Cache Introduction Sparksupports pulling data sets into a cluster-wide in-memory cache. scala> val textFile = sc.textFile("README.md") textFile: org.apache.spark.rdd.RDD[String] = MapPartitionsRDD[12] at textFile at <console>:21 scala> val linesWithSpark = textFile.filter(line => line.contains("Spark")) linesWithSpark: org.apache.spark.rdd.RDD[String] = MapPartitionsRDD[13] at filter at <console>:23 scala> linesWithSpark.cache() res11: linesWithSpark.type = MapPartitionsRDD[13] at filter at <console>:23 scala> linesWithSpark.count() res12: Long = 19
- 33. Spark SQL Introduction SparkSQL is Spark's module for working with structured data. ● Mix SQL queries with Spark programs ● Uniform Data Access, Connect to any data source ● DataFrames and SQL provide a common way to access a variety of data sources, including Hive, Avro, Parquet, ORC, JSON, and JDBC. ● Hive Compatibility Run unmodified Hive queries on existing data. ● Connect through JDBC or ODBC.
- 35. Spark Streaming Introduction SparkStreaming is an extension of the core Spark API that enables scalable, high-throughput, fault-tolerant stream processing of live data streams.
- 36. $git clone https://github.com/rahulkumar-aws/WordCount.git $nc -lk 9999 sbt "run-main StreamingWordCount"
- 37. Reactive Application • Responsive •Resilient • Elastic • Event Driven http://www.reactivemanifesto.org
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- 40. Play Framework The HighVelocity Web Framework For Java and Scala ● RESTful by default ● JSON is a first class citizen ● Web sockets, Comet, EventSource ● Extensive NoSQL & Big Data Support https://www.playframework.com/download https://downloads.typesafe.com/typesafe-activator/1.3.5/typesafe-activator-1.3.5-minimal.zip
- 41. Akka Akka is atoolkit and runtime for building highly concurrent, distributed, and resilient message-driven applications on the JVM. ● Simple Concurrency & Distribution ● Resilient by Design ● High Performance ● Elastic & Decentralised ● Extensible Akka uses Actor Model that raise the abstraction level and provide a better platform to build scalable, resilient and responsive applications.
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- 43. References https://www.cs.berkeley.edu/~matei/papers/2012/nsdi_spark.pdf http://spark.apache.org/docs/latest/quick-start.html Learning Spark Lightning-FastBig Data Analysis By Holden Karau, Andy Konwinski, Patrick Wendell, Matei Zaharia https://www.playframework.com/documentation/2.4.x/Home http://doc.akka.io/docs/akka/2.3.12/scala.html
- 44. Thank You Rahul Kumarrahul.k@sigmoid.com @rahul_kumar_aws