https://www.edureka.co/blog/hadoop-tutorial/
https://www.youtube.com/watch?v=Pq3OyQO-l3E
https://www.youtube.com/watch?v=DCaiZq3aBSc
https://www.youtube.com/watch?v=tKNGB5IZPFE
https://www.youtube.com/watch?v=rr17cbPGWGA
https://cwiki.apache.org/confluence/display/Hive/GettingStarted
#Map Reduce -: