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Drill into Your Big Data Today with Apache Drill

Apache Drill has been gaining significant user adoption and community momentum since its initial Beta availability in September 2014. The generally available version of Drill—Drill 1.0—was released in May 2015, and numerous customers have deployed and used Drill in production since then. In this blog post, I will briefly summarize some of the key capabilities that customers are finding immensely ...

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Why Docker?

Containers are not a new thing, but implementing them was always a little more complicated than it needed to be. Docker made great leaps in simplification of containers and set the world on fire from there. Let’s look at why. Why Docker Became a Household Name Docker isn’t very old. It was about to hit its 1.0 release in May ...

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Hadoop: HDFS – java.lang.NoSuchMethodError: org.apache.hadoop.fs.FSOutputSummer.(Ljava/util/zip/Checksum;II)V

I wanted to write a little program to check that one machine could communicate a HDFS server running on the other and adapted some code from the Hadoop wiki as follows: package org.playground;   import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.FSDataInputStream; import org.apache.hadoop.fs.FSDataOutputStream; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.fs.Path;   import;   public class HadoopDFSFileReadWrite {   static void printAndExit(String str) { System.err.println( str ...

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Akka Typed Actors: Exploring the receiver pattern

In the previous article we looked at some of the basic features provided by Akka Typed. In this article and the next one we’ll look a bit closer at some more features and do that by looking at the two different patterns provided by Akka Typed: the Receiver and the Receptionist pattern. If you’re new to Akka Typed, it might ...

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Event sourcing + free monads = free sourcing?

I recently wrote about Event Sourcing and Free Monads. The natural next step is combining the two! How would a free monad adjusted for event sourcing look like? Please bear in mind that the below is just really a draft, not a complete solution. Hence any suggestions for improvements are very welcome! But, let’s review the basic assumptions. Our application ...

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Introduction to Apache Spark with Examples and Use Cases

I first heard of Spark in late 2013 when I became interested in Scala, the language in which Spark is written. Some time later, I did a fun data science project trying to predict survival on the Titanic. This turned out to be a great way to get further introduced to Spark concepts and programming. I highly recommend it for ...

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What is a Tidy Codebase?

I came across the book recently ‘The Life-Changing Magic of Tidying Up.‘ I think I got a sample on the Play Store and right away thought ‘wow, this woman is an amazing writing voice.‘ Now that I have read a bunch of the book I know why: 1. it‘s a screed, delivered politely, like a witches curse delivered in a ...

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