Hadoop is an open-source framework for data processing written in JAVA. First lets dig deep into the history of Hadoop and from where did this name came. Kids are very good at inventing new names. Like the word Googol is a kid's term and later on it was improvised by the company and made GOOGLE. Doug cutting is the creator of Hadoop. And the idea of the name Hadoop came to him through his son. His son named a yellow colored stuffed elephant toy as Hadoop. And Hadoop was named after his son started calling the stuffed elephant toy Hadoop Hadoop. Hadoop is an framework which allows us to process large data sets (i.e., data sets in zeta bytes and peta bytes).