Hadoop is an open source distributed processing framework that manages data processing and storage for big data applications running in clustered systems. Hadoop is an open-source software framework used for storing and processing Big Data in a distributed manner on large clusters of commodity hardware. ... Hadoop was developed, based on the paper written by Google on MapReduce system and it applies concepts of functional programming.

Hadoop programming is easier for people with SQL skills too -thanks to Pig and Hive. Students or professionals without any programming background, with just basic SQL knowledge, can master Hadoop through comprehensive hands-on Hadoop training if they have the zeal and willingness to learn. it is not tough to learn Big Data Hadoop .Apache Hadoop is a big ecosystem consisting of many technologies ranging from an processing framework(MapReduce),Storage system(HDFS),an data flow language tool(Apache Pig) ,an SQL language tool(Apache Hive),tool for ingesting data on hadoop (Apache Sqoop) and a Non .

As the size of data increases, the demand for Hadoop technology will rise. There will be need of more Hadoop developers to deal with the big data challenges. IT professionals having Hadoop skills will be benefited with increased salary packages and an accelerated career growth.