For those who want to add Hadoop to their skillset, or hone the skills they already have, look to free online courses to jumpstart your learning.
Hadoop, an Apache open source software framework for storing and crunching big data sets across clusters of machines, has hit the big time. Markets and Markets forecasted in January 2017 that the Hadoop market could grow from $6.71 billion in 2016 to more than $40 billion by 2021. (For perspective, that same market expanded from $1.5 billion to $4 billion from 2012 through 2014.) Growth on that scale precipitates an urgent need for many more able-bodied IT pros to develop, manage and administer all those Hadoop implementations.
Given ample time and a penchant for the topic, many people in the field feel that you can learn what you need to know about Hadoop via self-study. For those folks, browsing the plethora of documentation on the Apache Hadoop website is a good starting point. You can also download the open source Hadoop release, giving you the opportunity to turn some knobs and explore at your own pace. Administrators and developers who prefer a more structured learning experience can take advantage of free online training courses that can get you to your goal a lot faster.
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Certifications
In no particular order, here are over a dozen terrific free sources for Hadoop training.
Big Data University offers more than 50 courses on Hadoop, HBase, Pig, big data analytics, SQL, IBM BLU, DB2 and more, all available at your own pace. Most courses are in English, but some are in Japanese, Spanish, Portuguese, Russian and Polish.
Cloudera has a Cloudera Essentials for Apache Hadoop online video course that's distributed chapter by chapter, as well as Hadoop training aimed at administrators, data analysts, data scientists and developers. Your next step could be taking the three-lesson Introduction to Hadoop and MapReducecourse, offered through Udacity. Cloudera also has a free live Hadoop demo, called Cloudera Live, to help you learn that environment.
Dispensing with glitz and glam, coreservlets.com provides a series of tutorials on developing big data applications with Hadoop, delivered from a straight-up text-based interface. Each tutorial section lets you follow along using PDFs and/or slideshares, but you also get downloadable virtual machines in some instances as well as exercises (with solutions).
4. Coursera
Coursera has a large library of courses that are offered in partnership with several leading universities, such as UC San Diego, Stanford, Duke and many more. The company's policy states that you can access video lectures and certain non-graded assignments for free in all courses. These previews give you the opportunity to decide if you want to purchase a course (priced between $29 and $99) and perhaps keep going to complete a certificate.
5. edX
Similar to Coursera, edX offers courses from well-known universities, as well as high-tech firms and other contributors. On the main web page, enter "hadoop" into the search field to see what's currently available. You can audit an edX course for free, and work through all assignments and exams, but only paid participants receive a certificate of completion.
6. DeZyre
DeZyre lets you learn about big data and Hadoop from industry experts, get a mentor and complete projects... for a fee. But the company's free tutorials are available to anyone, anytime. Browse the lengthy list of tutorials on the DeZyre Tutorials page and click into anything that sparks your interest — no signup needed.
7. Hortonworks
Hortonworks also has a lot of good for-a-fee courses as well as free Hadoop training and tutorials. For most tutorials, you'll need to download and install the Hortonworks Sandbox, and the company recommends other tutorials as prerequisites to ensure you're ready to learn most efficiently.
IBM developerWorks serves up free tutorials and tools for big data analytics, cloud computing and other high-tech categories, based on IBM technologies. For example, Choose IBM Open Platform for your Hadoop and Spark projects explores this Apache Hadoop and Apache Spark distribution, describing the purpose or function of each component, such as Spark, MapReduce, Sqoop and more. Although it's a little long in the tooth, Open Source Big Data for the Impatient is a solid tutorial that walks you through the fundamentals of big data and Hadoop, and has you download a Hadoop image (Cloudera is recommended) to work through examples of Hadoop, Hive, Pig, Oozie and Sqoop.
The Hadoop training and tutorials site managed by Anil Jain provides links to branded (for a fee) training as well as free online tutorials. Several of the free resources are also featured in this blog post but there are others that are definitely worth a look.
MapR is the provider of a leading Apache Hadoop distribution. The company's on-demand Hadoop training courses include video lessons, labs, hands-on exercises and more, and can lead to certification as a Hadoop Cluster Administrator, Hadoop Data Analyst or Hadoop Developer. MapR currently offers Apache Hadoop Essentials, five different Cluster Administration courses, Developing Hadoop Applications and many more on-demand courses that cover HBase, MapR Streams, Apache Spark, Apache Drill and Apache Hive.
11. Udacity
Udacity is well known for its catalog of training courses on data science, web development, software engineering and mobile operating systems — built by Silicon Valley heavy-hitters like Facebook and Twitter, Cadence and many more. Udacity offers free courses and course materials, but you must enroll in a paid program to earn a Nanodegree credential. To see all free courses at a glance, go to the Courses and Nanodegree Programs page and check the Free Courses checkbox.
12. Udemy
Udemy offers more than 40,000 free and for-a-fee courses on just about everything under the sun. When you get to the home page, enter "Hadoop free" in the search box to see what's currently being offered. You should get several hits on courses that range from 5 to more than 40 lectures each, aimed mainly at the beginner to intermediate levels.
Microsoft Virtual Academy offers a big data analytics video training course that focuses on HDInsight (which is Microsoft's managed Hadoop distribution that runs on the Azure cloud) and using Hadoop on Azure. The free video course covers Hive, Tez, Pig, Sqoop, Oozie and Mahout, and offers additional resources and next steps.
14. YouTube
As you would expect, YouTube has a long list of Hadoop training videos. Search for "Hadoop" on the main page, noodle through the results and pick some videos that look right for you.
There's also great information on Hadoop training resources exchanged by members of the Hadoop Users LinkedIn group.
There's certainly no shortage of material on Hadoop, so you are certain to find something you can chew on to increase your skills and knowledge in this area.
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