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Machine Learning using Spark-Scala - Hands-on

Tools used: IntelliJ, Spark • Programming languages: Scala

Project Status: Active – The project has reached a stable, usable state and is being actively developed.

The following gist is intended to Data Engineers. It focuses on Spark and Scala for Machine Learning.
If we want to handle batch and real-time data processing, this gist is definitely worth checking.
We'll learn how to install and use Spark and Scala on a Linux system.
We'll learn latest Spark 2.0 methods and updates to the MLlib library working with Spark SQL and Dataframes. Please fork it if you find it relevant for our educational or professional path.

How is gist is structured

This gist is structured into 2 parts:

Part 1. Machine Leaning using Spark-Scala (Linear Regression)

Important

Scala

. Scala is a general purpose programming language.
. Scala was designed by Martin Odersky (Ecole Polytechnique Fédérale de Lausanne).
. Scala source code is intended to be compiled to Java bytecode to run on a Java Virtual Machine (JVM).
. Java librairies can be used directly in Scala.

Spark

. Spark is one of the most powerful Big Data tools.
. Spark runs programs up to 100x faster than Hadoop's MapReduce.
. Spark can use data stored in Cassandra, Amazon S3, Hadoop'sHDFS, etc.
. MapReduce requires files to be stored in HDFS, Spark does not.
. Spark performs 100x faster than Mapreduce because it writes jobs in-memory. Mapreduce writes job on disk.

Data Processing

. MapReduce (Hadoop) writes most data to disk after each Map and Reduce operation.
. Spark keeps most of the data in memory after each transformation.
. At the core of Spark there are Resilient Distributed Datasets also known as RDDs.
. An RDD has 4 main features:

  1. Distributed collection of data
  2. Fault-tolerant
  3. Parallel operations which are partitioned
  4. An RDD can use many data sources

. RDDs are immutable, cacheable and lazily evaluated. . There are 2 types of RDD operations:

  1. Transformations: recipes to follow
  2. Actions: performs recipe's instructions and returns a result

Environment options for Scala and Spark

  1. Text editors, such as Sublime Text and Atom
  2. IDEs (Integrated Development Environments), such as IntelliJ and Eclipse
  3. Notebooks, such as Jupyter, Zeppelin and Databricks

Resources

I've uploaded a .zip file ** which contains useful slides related to MachineLearning, Spark and Scala.
https://bit.ly/2zkcrP7

Author

  • Isaac Arnault - Introducing Machine Learning using Spark-Scala - Related tags: #EC2 #TLS #AWSCLI #Linux
    ** © Perian Data