Walmart has wide big data ecosystem. Everyday this system processes multiple petabytes of historical data and Terabytes of new data. The analysis covers million of customers and products from various sources. The main objective of imposing vig data is to provide a good experience to customer when the are at Walmart store or using Walmart’s website. Walmart develops big data solution is to restyle global websites. It has changed the world’s decision making process leading to higher sales. Walmart has experienced an increase in online sales from 10% to 15% after introducing this system