Big Data Hadoop & Spark

How to Land in your dream Big Data Job

In the current job scenario, where Big Data is one of the most sought after skill in IT industry, learning Big Data skills can surely open door to a highly lucrative career.

But the big question that boggles everyone’s mind is, “How to become a Big Data Hadoop Developer?”

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In this eBook, we will be discussing the best practices and steps, which will help you become a Big Data/ Hadoop Developer.

No one is denying the fact that Hadoop and Big Data have become synonymous to each other as Big Data processing has become easier than ever, with technologies like Hadoop and Spark.

Hadoop related jobs are no longer confined to just Tech companies but also other types of companies which include, financial firms, retail organizations, banks, healthcare organizations, Government organizations, Advertisement sectors, etc. and recruiter are looking for Hadoopers to work in these sectors.

So let’s take a look at the step-by-step approach to becoming a Big Data Developer.

Big Data is a cluster of many technologies and tools that are used in various setups and fulfilling any of the below three skills sets will give the learner an upper hand to begin their career in Big Data.

Let’s have a look at the necessary skills to become a Big Data Developer.

Step1: Prerequisites for Learning Big Data

To process to the next step of learning Big Data, you need to have at least one of the below-mentioned skills, as these skills will you learn Big Data concepts easily.

Programming Skills:

Having the necessary programming skills is very vital and the first step to start with Big Data. Knowledge of the following language will be a great way to kick start your Big Data learning.

  •     Learn Java     – If you are looking for a “Big Data Developer Job,” learning     Java is highly suggested. Big Data technology like Hadoop is written in Java; hence, the knowledge of Java basics is helpful to learn     Hadoop.
  •     Learn Python     – Python is considered to be the easiest programming language in the world because of its simple syntax, allowing you to learn it quickly.

Unix/Linux Operating System and Shell Scripting:

Good practice in shell scripting makes your life easier when it comes to Big Data. Many tools in Big Data has the command line interface where the commands are based on the shell scripting and Unix commands.

SQL (Structured Query Language):

SQL, popularly known as ‘sequel’, makes Hive (a query language for Big Data) easier. Playing around with SQL in relational databases helps us understand the querying process of large data sets.

Hadoop

Step 2: Learning about Big Data Platforms:

Once you are confident that you will be able to solve basic problems using Java/Python/SQL, you are ready to take the next step. You need to learn about some Big Data technologies like Hadoop and Spark.

Hadoop would be the best place to start, as it is quickly becoming the nucleus of Big Data solutions for many enterprises. The Hadoop ecosystem is growing with lots of new technologies/stacks added every day. It would be really helpful for a professional to get familiar with the below technologies before starting their career in Big Data.

  • MapReduce is the Google paper that started it all (Page on googleusercontent.com).     It is a paradigm for writing distributed code inspired by some elements of functional programming. You don’t have to do things this way, but it neatly solves a lot of problems we try to solve in a     distributed way. The Google internal implementation is called     MapReduce and Hadoop is its open-source implementation. Amazon’s Hadoop instance is called Elastic MapReduce (EMR)     and has plugins for multiple languages.
  • HDFS is an implementation inspired by the Google File System  (GFS) to store files across a bunch of machines when it is too big for one. Hadoop consumes data in HDFS (Hadoop Distributed File System).
  • Hive and Pig: They are abstractions on top of Hadoop designed to help analysis of tabular data stored in a distributed file system (think of excel sheets too big to store on one machine). They operate on top of a     data warehouse,     so the high-level idea is to dump data once and analyze it by reading and processing it instead of updating cells, rows, and columns individually. Hive has a language similar to SQL while Pig     is inspired by Google’s Sawzall     (Google Research Publication: Sawzall.)You generally don’t update a single cell in a table when processing it with Hive or Pig.
  • Mahout     (Scalable machine learning and data mining) is a     collection of machine learning libraries written in the MapReduce paradigm, specifically for Hadoop. Google has its own internal version but they haven’t     published a paper on it as far as I know.
  • Oozie is a workflow scheduler. The oversimplified description would be that it’s something that puts together a pipeline of     the tools described above. For example, you can write an Oozie script that will scrape your production HBase data to a Hive warehouse nightly, then a Mahout script will train with this data. At the same time, you might use Pig to pull in the test set into another file and when Mahout is done creating a model you can pass the testing data through the model and get results. You specify the dependency graph of these tasks through Oozie (I may be messing up terminology since I’ve never used Oozie but have used the Facebook equivalent).
  • Lucene is a bunch of search-related and NLP tools but its core feature is being a search index and retrieval system. It takes data from a     store like HBase and indexes it for fast retrieval from a search query. Solr uses Lucene under the hood to provide a convenient REST API for indexing and searching data. ElasticSearch is similar to Solr.
  • Sqoop: Enterprises that use Hadoop often find it necessary to transfer some of their data from traditional relational database management systems (RDBMSs) to the Hadoop ecosystem. Sqoop, an integral part of Hadoop and can perform this transfer in an automated fashion.Sqoop uses a connector-based architecture that allows it to use plugins to connect to external databases.

The NoSQL database:

Also called as ‘Not Only SQL’, NoSQL is an approach to data management and database design that’s useful for very large sets of distributed data. This database system is non-relational, distributed, open-source and horizontally scalable. NoSQL seeks to solve the scalability and Big Data performance issues that relational databases weren’t designed to address.

Most popular NoSQL databases in Big Data projects these days are Apache Cassandra, MongoDB, and HBase.

To get more insights on Big Data terminologies, you can refer to this post.

Learning Spark:

Now comes the next part of your learning process – learning Spark. This should be done after gaining a little bit of experience with Hadoop. Spark will provide you the speed and tools that Hadoop couldn’t. However, in order to learn Spark, you need to have prior knowledge of Scala/Python/Java/R to use it.

We suggest our readers go through the below links which would help them to start learning about Spark.

https://acadgild.com/blog/beginners-guide-for-spark/

https://acadgild.com/blog/rdd-spark/

https://acadgild.com/blog/introduction-spark-rdd-basic-operations-rdd/

Step 3: Learning Analytics & Visualization:

After solving the Big Data problem, we acquire data in a manageable format, and the platform is setup for generating reports. Most enterprise architectures leveraging Hadoop still have a SQL Database to store and report data out of Hadoop. Loading data out of Hadoop and into a SQL database is a good practice in the real world, but for the sake of learning the Big Data side of it, it is not necessary. Several (free) reporting tools are available out there, that will connect to Hadoop/Hive directly and will work fine for learning purposes.

Many visualization tools like Tableau, Qlikview, and Power BI are very much popular in the industry.

Following are the top resources which can be valuable to Big Data Hadoop developers.

Books

Hadoop: The Definitive Guide – by Tom White

This is the best book for Hadoop beginners. This book can you adapt to the world of Big Data management. The book is written in an easy language which can be understood by a beginner. The first eight chapters are critical in understanding the nuances of this technology. A basic knowledge of Java language is an advantage and helpful in understanding the book better.

Knowledge of Hadoop administration is useful in understanding how the framework works internally.

Hadoop Operationsby Eric Sammer

This book discusses the technology in depth, detailing the particulars of running Hadoop in actual production. The chapter on HDFS is very useful and this book can well qualify as a user’s manual where all aspects of Hadoop technology are explained in an easily understandable language. The book would impress the beginners and advanced learners as well because all the aspects of software and related technologies are explained in great detail.

Professional Hadoop Solutionsby Boris Lublinsky, Kevin T. Smith, Alexey Yakubovich

This book is much more than just an overview or a guide and provides in-depth insight about Hadoop and related technologies. The first chapter is a sort of an introduction and as you proceed further on the various aspects of MapReduce programming, Oozie, you would realize how critical it is to understand these technologies to become a skilled Hadoop developer. This book is recommended for all advanced learners of Big Data management technology and those who want to apply the concepts in their own domain.

If you want to get an in-depth knowledge about specific tools, then it is recommended to read the books like:

  • Programming Pig by Alan Gates
  • Programming Hive by  Dean Wampler, Edward Capriolo, and Jason Rutherglen
  • MapReduce Design Patterns by Adam Shook and Donald Miner

Blogs

The following blogs are useful and provide information on various aspects of Hadoop along with the latest updates.

Hadoop Weekly

Hadoop Weekly is a summary of the week’s top news in the Apache Hadoop™ ecosystem. It is aimed at developers or those trying to keep themselves updated with the latest Hadoop developments.

It gathers the latest and the most shared Hadoop content on Twitter, Facebook, Google+ and LinkedIn every week. By subscribing to this weekly channel, you won’t miss any important new Hadoop content. Guaranteed! Join 7,428 other subscribers today.

https://www.hadoopweekly.com/index.html

AcadGild Blog

AcadGild is a technology education start-up which provides online courses in latest technologies such as Android development, Big Data, Cloud computing, Front End development, Digital Marketing, Machine Learning, Node JS, Robotics.

https://acadgild.com/blog/

Data Science Central

Data Science Central is the industry’s online resource for big data practitioners. Ranging from Analytics to Data Integration and Visualization, Data Science Central provides a community experience that includes a robust editorial platform, social interaction, forum-based technical support, the latest in technology, tools, and trends, including job opportunities.

The Hortonworks Blog

Hortonworks is a leading innovator in the industry, creating, distributing and supporting enterprise-ready open data platforms and modern data applications. They have a very good repository of Hadoop and related technologies.

Cloudera Engineering Blog

Cloudera provides a modern platform for data management and analytics. It provides the world’s fastest, easiest, and most secure Apache Hadoop platform. This helps you solve the most challenging business problems with data.

You can download Hortonworks or Cloudera Sandbox or Apache Hadoop AcadGild VM.

Cloudera QuickStart VM

Hortonworks Sandbox

Data Analytics

You can get information on data mining from the following link.

Data Mining – Research at Google

You can visit the official Apache Hadoop website for more information and the latest news on Hadoop.

http://hadoop.apache.org

LinkedIn groups

Hadoop Users

This group is the original and most established group of Hadoop users on LinkedIn.

Description: A group for Hadoop users

Activity: Active, 47 discussions this month

Member Count: 24,236 members

Created: October 7, 2008

Cloudera Hadoop Users

This group is a subgroup of the above Hadoop Users group, focusing on Cloudera, which is a commercial enterprise version of Hadoop.  Below is a description of the group.

Description: Cloudera (www.cloudera.com) is the leading provider of Apache Hadoop-based software and services and works with customers in financial services, web, retail, telecommunications, government and other industries. Cloudera’s Distribution for Apache Hadoop and Cloudera Enterprise, help organizations with their rich source of information.

Activity: Very Active,117 discussions this month

Member Count: 4,033 members

Created: June 26, 2009

Hadoop Hive

This group discusses the use of the Hive language, which is a high-level SQL-like language used on top of MapReduce for easy access to data on Hadoop.

Description: Hive is a data warehouse infrastructure built on top of Hadoop that provides tools to enable easy data summarization, ad-hoc querying, and analysis of large dataset stored in Hadoop files. It provides a mechanism to enforce structure on this data and it also provides a simple query language called Hive QL which is based on SQL, which enables users who are familiar with SQL to query this data. At the same time, this language also allows traditional map/reduce programmers to be able to plug in their custom mappers and reducers to do more sophisticated analysis which may not be supported by the built-in capabilities of the language.

Activity: Very Active,70 discussions this month

Members Count: 3,339 members

Created: June 15, 2009

Notes: It is a subproject of Hadoop

Hadoop India

This group is on the top 10 list and consists of regional members in India who use Hadoop.  The most represented area in this group is Bengaluru, India (29%).

Description: Group for Hadoop India Users

Activity: Very Active,199 discussions this month

Member Count: 3,185 members

Created: September 2, 2009

Visit the group on LinkedIn

BIG DATA Professionals, Architects, Scientists, Analytics Experts Developers Cloud Computing NoSQL BI

Description: This is an extremely active group, with over 900 new discussions per month.  Remember, you can set your group email preferences to a summary digest to limit the number of emails that you receive from this group.

Technologies covered: Information Technology, Predictive Modeling, Business Intelligence (BI), Decision Support, Text Mining, Machine Virtualization, Statistics, Apps Developer Software Enterprise, Mobile Web Oracle Database, SAAS, Linux, Java API, Cloudera, MapR, Greenplum.

Activity: Very Active, 937 discussions this month

Member Count: 14,828 members

Created: Created: September 1, 2008

Visit the group on LinkedIn

Check out these resources to enrich your skills in Big Data and Hadoop.

We hope this Blog has been helpful in understanding the vital steps necessary to make your career in Big Data domain.

We would also like to give credit to Abhinav Sharma for his contribution in writing this blog.

Keep visiting our websites www.acadgild.com for more posts on Big Data and other technologies.

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One Comment

  1. IT World is making exponential growth with Big Data Analytics being employed by government agencies and private companies. The industry is witnessing rapid growth driven by increased demand for Big Data and predictive analytics solutions by industries such as BFSI, retail, telecom and healthcare.
    This anticipated growth and use of big data is nurturing and enhancing to translate into financial opportunities and job creation while also making India the largest data analytics market in the world. For professionals, who are skilled in Big Data Analytics, there is an ocean of opportunities out there.

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