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You're reading from  Scala Data Analysis Cookbook

Product typeBook
Published inOct 2015
Reading LevelIntermediate
Publisher
ISBN-139781784396749
Edition1st Edition
Languages
Scala
Tools
Apache Spark
Concepts
Data Analysis
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Author (1)
Arun Manivannan
Arun Manivannan
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Arun Manivannan

Arun Manivannan has been an engineer in various multinational companies, tier-1 financial institutions, and start-ups, primarily focusing on developing distributed applications that manage and mine data. His languages of choice are Scala and Java, but he also meddles around with various others for kicks. He blogs at http://rerun.me. Arun holds a master's degree in software engineering from the National University of Singapore. He also holds degrees in commerce, computer applications, and HR management. His interests and education could probably be a good dataset for clustering.
Read more about Arun Manivannan

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Building the Uber JAR

The first step for deploying our Spark application on a cluster is to bundle it into a single Uber JAR, also known as the assembly JAR. In this recipe, we'll be looking at how to use the SBT assembly plugin to generate the assembly JAR. We'll be using this assembly JAR in subsequent recipes when we run Spark in distributed mode. We could alternatively set dependent JARs using the spark.driver.extraClassPath property (https://spark.apache.org/docs/1.3.1/configuration.html#runtime-environment). However, for a large number of dependent JARs, this is inconvenient.

How to do it...

The goal of building the assembly JAR is to build a single, Fat JAR that contains all dependencies and our Spark application. Refer to the following screenshot, which shows the innards of an assembly JAR. You can see not only the application's files in the JAR, but also all the packages and files of the dependent libraries:

The assembly JAR can easily be built in SBT using the SBT assembly plugin...

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Scala Data Analysis Cookbook
Published in: Oct 2015Publisher: ISBN-13: 9781784396749
© 2015 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Arun Manivannan

Arun Manivannan has been an engineer in various multinational companies, tier-1 financial institutions, and start-ups, primarily focusing on developing distributed applications that manage and mine data. His languages of choice are Scala and Java, but he also meddles around with various others for kicks. He blogs at http://rerun.me. Arun holds a master's degree in software engineering from the National University of Singapore. He also holds degrees in commerce, computer applications, and HR management. His interests and education could probably be a good dataset for clustering.
Read more about Arun Manivannan

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