List/Grid Tag Archives: Apache Hadoop

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Apache Hadoop 2.4.0

The Apache community has voted to release Apache Hadoop 2.4.0, so the new release is now available and consists of important improvements. The improvements are related not only to HDFS ...
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Hadoop MapReduce Concepts

What do you mean by Map-Reduce programming? MapReduce is a programming model designed for processing large volumes of data in parallel by dividing the work into a set of independent ...
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MapReduce Algorithms – Understanding Data Joins Part II

It’s been awhile since I last posted, and like last time I took a big break, I was taking some classes on Coursera. This time it was Functional Programming Principals in Scala and ...
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Coordination and service discovery with Apache Zookeeper

Service-oriented design has proven to be a successful solution for a huge variety of different distributed systems. When used properly, it has a lot of benefits. But as number of services ...
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Configuring Hadoop with Guava MapSplitters

In this post we are going to provide a new twist on passing configuration parameters to a Hadoop Mapper via the Context object. Typically, we set configuration parameters as key/value ...
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Unit testing a Java Hadoop job

In my previous post I showed how to setup a complete Maven based project to create a Hadoop job in Java. Of course it wasn’t complete because it is missing the unit test part . In ...
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Run your Hadoop MapReduce job on Amazon EMR

I have posted a while ago how to setup an EMR cluster by using CLI. In this post I will show how to setup the cluster by using the Java SDK for AWS. The best way to show how to do this ...
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Writing a Hadoop MapReduce task in Java

Although Hadoop Framework itself is created with Java the MapReduce jobs can be written in many different languages. In this post I show how to create a MapReduce job in Java based ...
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Big Data Open Source Security

In security there has never (IMHO) been enough open source solutions and Bruce Schneier has written about this several times in the past, and there’s no need to rewrite the arguments ...
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MapReduce Algorithms – Understanding Data Joins Part 1

In this post we continue with our series of implementing the algorithms found in the Data-Intensive Text Processing with MapReduce book, this time discussing data joins. While we are ...
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