ABSTRACT
Relational databases and data warehouses are necessary to run corporate businesses. They were designed for specic functionality in which they excel. Hadoop was not designed to replace them. Hadoop adds additional capabilities and features that together with relational databases and data warehouses are dening the next evolution of enterprise data platforms. Previously, it was believed that you could have speed, reliability, and price, but not all three at the same time. Hadoop changes that because with Hadoop you can have speed, reliability, and optimal price (commodity hardware) at the same time.
