Getting Started with Hadoop
In this article we will learn introduction to Hadoop and its ecosystem.
I am a Tech Enthusiast having 13+ years of experience in ๐๐ as a ๐๐จ๐ง๐ฌ๐ฎ๐ฅ๐ญ๐๐ง๐ญ, ๐๐จ๐ซ๐ฉ๐จ๐ซ๐๐ญ๐ ๐๐ซ๐๐ข๐ง๐๐ซ, ๐๐๐ง๐ญ๐จ๐ซ, with 12+ years in training and mentoring in ๐๐จ๐๐ญ๐ฐ๐๐ซ๐ ๐๐ง๐ ๐ข๐ง๐๐๐ซ๐ข๐ง๐ , ๐๐๐ญ๐ ๐๐ง๐ ๐ข๐ง๐๐๐ซ๐ข๐ง๐ , ๐๐๐ฌ๐ญ ๐๐ฎ๐ญ๐จ๐ฆ๐๐ญ๐ข๐จ๐ง ๐๐ง๐ ๐๐๐ญ๐ ๐๐๐ข๐๐ง๐๐. I have ๐๐๐๐๐๐๐ ๐๐๐๐ ๐๐๐๐ 10,000+ ๐ฐ๐ป ๐ท๐๐๐๐๐๐๐๐๐๐๐๐ and ๐๐๐๐ ๐๐๐๐๐ ๐๐๐๐ ๐๐๐๐ 500+ ๐๐๐๐๐๐๐๐ ๐๐๐๐๐๐๐๐ in the areas of ๐๐จ๐๐ญ๐ฐ๐๐ซ๐ ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐ฆ๐๐ง๐ญ, ๐๐๐ญ๐ ๐๐ง๐ ๐ข๐ง๐๐๐ซ๐ข๐ง๐ , ๐๐ฅ๐จ๐ฎ๐, ๐๐๐ญ๐ ๐๐ง๐๐ฅ๐ฒ๐ฌ๐ข๐ฌ, ๐๐๐ญ๐ ๐๐ข๐ฌ๐ฎ๐๐ฅ๐ข๐ณ๐๐ญ๐ข๐จ๐ง๐ฌ, ๐๐ซ๐ญ๐ข๐๐ข๐๐ข๐๐ฅ ๐๐ง๐ญ๐๐ฅ๐ฅ๐ข๐ ๐๐ง๐๐ ๐๐ง๐ ๐๐๐๐ก๐ข๐ง๐ ๐๐๐๐ซ๐ง๐ข๐ง๐ . I am interested in ๐ฐ๐ซ๐ข๐ญ๐ข๐ง๐ ๐๐ฅ๐จ๐ ๐ฌ, ๐ฌ๐ก๐๐ซ๐ข๐ง๐ ๐ญ๐๐๐ก๐ง๐ข๐๐๐ฅ ๐ค๐ง๐จ๐ฐ๐ฅ๐๐๐ ๐, ๐ฌ๐จ๐ฅ๐ฏ๐ข๐ง๐ ๐ญ๐๐๐ก๐ง๐ข๐๐๐ฅ ๐ข๐ฌ๐ฌ๐ฎ๐๐ฌ, ๐ซ๐๐๐๐ข๐ง๐ ๐๐ง๐ ๐ฅ๐๐๐ซ๐ง๐ข๐ง๐ new subjects.
What is Hadoop
Apache Hadoop is an open-source software, Scalable, and Fault-tolerant framework written in Java which is used for storing and processing Big Data in a distributed manner on large clusters of computers.
Components of Hadoop
Hadoop consists of three main components
Hadoop Distributed File System (HDFS) - It is a Storage Layer
Map Reduce - It is a Processing Layer
YARN - It is a Resource Management Layer
Hadoop Daemons
To support these components Hadoop provides you 5 daemon services
NameNode
SecondaryNameNode
DataNode
ResourceManager
NodeManager
History of Hadoop
The Hadoop was started by Doug Cutting and Mike Cafarella in 2002. Its origin was the Google File System paper, published by Google.
Letโs focus on the history of Hadoop in the following steps: -
In 2002, Doug Cutting and Mike Cafarella started to work on a project, Apache Nutch. It is an open source web crawler software project.
While working on Apache Nutch, they were dealing with big data. To store that data they have to spend a lot of costs which becomes the consequence of that project. This problem becomes one of the important reason for the emergence of Hadoop.
In 2003, Google introduced a file system known as GFS (Google file system). It is a proprietary distributed file system developed to provide efficient access to data.
In 2004, Google released a white paper on Map Reduce. This technique simplifies the data processing on large clusters.
In 2005, Doug Cutting and Mike Cafarella introduced a new file system known as NDFS (Nutch Distributed File System). This file system also includes Map reduce.
In 2006, Doug Cutting quit Google and joined Yahoo. On the basis of the Nutch project, Dough Cutting introduces a new project Hadoop with a file system known as HDFS (Hadoop Distributed File System). Hadoop first version 0.1.0 released in this year.
Doug Cutting gave named his project Hadoop after his sonโs toy elephant.
In 2007, Yahoo runs two clusters of 1000 machines.
In 2008, Hadoop became the fastest system to sort 1 terabyte of data on a 900 node cluster within 209 seconds.
In 2013, Hadoop 2.2 was released.
