Chapter 2, Getting Hadoop Up and Running, walks you through the initial setup of a local Hadoop cluster and the running of some demo jobs. You will also find some other learning aids in the book, including: Pop quiz — heading These are short multiple-choice questions intended to help you test your own understanding. What you will learn from this book The trends that led to Hadoop and cloud services, giving the background to know when to use the technology. Im now moving alone to the other chapters very quickly. Some of his serious work in computers and computer networks began during his high school days. It assumes you have familiarity with a programming language such as Java or Ruby but gives you the needed background on the other topics. Have a go hero Too many abbreviations Using the Distributed Cache Time for action — using the Distributed Cache to improve location output What just happened? What is commodity hardware anyway? Additional property elements Default storage location Where to set properties Setting up a cluster How many hosts? It is my honor to be a part of it.
Time for action — fixing the mapping and re-running the export What just happened? Time for action — creating a table from an existing file What just happened? Chapter 6, When Things Break, examines Hadoop's much-vaunted high availability and fault tolerance in some detail and sees just how good it is by intentionally causing havoc through killing processes and intentionally using corrupt data. So I was looking for a beginner book for Hadoop. Time for action — the second run What just happened? Approach As a Packt Beginner's Guide, the book is packed with clear step-by-step instructions for performing the most useful tasks, getting you up and running quickly, and learning by doing. Hadoop Beginner's Guide - removes the mystery from Hadoop, presenting and related technologies with a focus on building working systems and getting the job done, using services to do so when it makes sense. Effective use of however requires a mixture of programming, design, and system skills.
For developers who want to know how to write MapReduce applications, we assume you are comfortable writing Java programs and are familiar with the Unix command-line interface. Effective use of Hadoop however requires a mixture of programming, design, and system administration skills. To preprocess or not to preprocess. I was already a non beginner in terms of the basic idea even basic setup up,writing simple map-reduce examples but I still consider myself a beginner overall. Get your mountain of data under control with Hadoop.
Uniquely amongst the major publishers, we seek to develop and publish the broadest range of learning and information products on each technology. I also recommend, before reading this book, downloading Hortonworks' Hadoop sandbox, and going through the tutorials included in it. Graph algorithms Graph 101 Graphs and MapReduce — a match made somewhere Representing a graph Time for action — representing the graph What just happened? The book also covers the administration aspects well and gives some handy information on Amazon Web Services. Register a Free 1 month Trial Account. Hadoop can help you tame the data beast. The first was published at least a year ago while the latter is fairly new - that means up to date.
Chapter 4, Developing MapReduce Programs, takes a case study of a moderately sized data set to demonstrate techniques to help when deciding how to approach the processing and analysis of a new data source. Finally, and this is an observation rather than a criticism, it should be kept in mind that this is truly a beginner's guide. Author doesnt try to bore you to death. That is why I consider investing at least some of my free tech reading time on learning more and more about this technology front, while it becomes more relevant for enterprises, software suppliers, developers and for sure end users. Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals.
Effective use of Hadoop however requires a mixture of programming, design, and system administration skills. Have a go hero Getting files into Hadoop Hidden issues Keeping network data on the network Hadoop dependencies Reliability Re-creating the wheel A common framework approach Introducing Apache Flume A note on versioning Time for action — installing and configuring Flume What just happened? The explanations are pretty good. But that's the only omission I can cite. Ho saltato i capitoli sulla programmazione di procedure map-reduce la riprenderò più avanti perché ero più interessato alla parte di amministrazione del server, quindi la valutazione esclude quei capitoli. Questions You can contact us at if you are having a problem with any aspect of the book, and we will do our best to address it. A complementary technology is the use of cloud computing, and in particular, the offerings from Amazon Web Services.
He is an Agile methodology adept and strongly believes that a daily coding routine makes good software architects. Three modes Time for action — configuring the pseudo-distributed mode What just happened? But I bought this book to learn the product which means, I'm left hanging every time there is an error. There are some things that are good about this book. You will also find a number of styles of text that distinguish between different kinds of information. Hands-on examples in each chapter give the big picture while also giving direct experience. Time for action — a more selective import What just happened? Selectors replicating and multiplexing Handling sink failure Have a go hero - Handling sink failure Next, the world Have a go hero - Next, the world The bigger picture Data lifecycle Staging data Scheduling Summary 11.
If readers are able to get past this, then there is nothing stopping them from achieving a good understanding of Hadoop. After a specific code hack or configuration fragment that was illustrated in each topic, these sections were trying to explain step by step, what exactly we tried to do. Vidyasagar N V has been interested in computer science since an early age. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: On the Select Destination Location screen, click on Next to accept the default destination. Get in touch with us at for more details. Time for action — formatting the NameNode What just happened? Hadoop - Beginner's Guide was a good fit for beginners like me. There is much else to learn.
Be aware that this book covers 1. Starting with the basics of installing and configuring Hadoop, the book explains how to develop applications, maintain the system, and how to use additional products to integrate with other systems. In addition, it gives some ideas on how to get involved with the Hadoop community and to get help. It then gets straight into having the reader setting up a Hadoop environment, working with MapReduce and writing MapReduce programs, and finally attempts to run through some of the more advanced topics in using MapReduce. He founded—and is working with—BigDataCraft. Developing MapReduce Programs Using languages other than Java with Hadoop How Hadoop Streaming works Why to use Hadoop Streaming Time for action — implementing WordCount using Streaming What just happened? Come guida introduttiva è buona.
In Detail Data is arriving faster than you can process it and the overall volumes keep growing at a rate that keeps you awake at night. PacktLib is Packt's online digital book library. In Detail Dat Get your mountain of data under control with Hadoop. Conventions In this book, you will find several headings appearing frequently. To skip or not to skip. In the simplest case, a single Linux-based machine will give you a platform to explore almost all the exercises in this book.