Netflix has movies/tv shows/etc
                
                and they need to "serve" these products to
                customers all over the world
                
                step 1) they break the video into 30 sec chunks
                         this way the chunks are being downlaoded
                         as the video is playing
                     2) make lots of copies of these chunks
                         and spread these copies around the world
                         
                Netflix needs servers, Netfix uses AWS
                and has 100,000 servers world wide
                
                Netflix supports 1 trillion I/O requests a day
                
                the AWS budget is estimated at $25 million a month
                
                Netflix uses an open-source Database from Apache
                named Cassandra to hold all this data (NoSQL DB)
                
                Netflix uses IaaS from AWS and they install custom
                web server, and Database