Big Data is an expression used to mean an enormous volume of both organized and unstructured data that is so extensive it is hard to process utilizing conventional database and programming methods. In most endeavor situations the volume of data is too big or it moves too quick or it surpasses current preparing limit. Big Data is an approach to take care of all the unsolved issues identified with data administration and taking care of, a prior industry was utilized to live with such issues. With Big data examination, you can open concealed examples and know the 360-degree perspective of clients and better comprehend their necessities. Hadoop is a free, Java-based programming framework that sponsorships the getting ready of broad instructive lists in a flowed enrolling condition. It is a bit of the Apache wander upheld by the Apache Software Foundation. Big Data is only an idea which encourages taking care of expansive measure of data sets. Hadoop is only a solitary structure out of many instruments. Hadoop is basically utilized for bunch handling. The contrast between big data and the open source programming Hadoop is an unmistakable and major one. Hadoop designer employments duties are to compose programs according to the framework plans and should have reasonable learning about the coding and programming. Undertaking of Hadoop designer is like programming engineer yet in Big Data space. Occupation of Hadoop designer additionally incorporates understanding and attempting to think of answers for issues, outlining and architecting alongside solid archiving aptitudes. The Hadoop Administration employments obligations are like the System overseer work. Hadoop administrator parts and obligations incorporate setting up Hadoop bunches, reinforcement, recuperation and upkeep of the same. Great information of equipment frameworks and Hadoop engineering is required by Hadoop executive.