What is Big Data? Big data refers to huge data sets that are orders of magnitude larger (volume); more diverse, including structured, semistructured, and unstructured data (varity); and arriving faster (velocity) than you or your organization has had to deal with before. This flood of data is generated by connected devices - from PCs and smart phones to sensors such as RFID readers and traffic cams. Plus, its' heterogeneous and comes in many formats, including text, document, image, video, and more. More: http://www.intel.com/content/dam/www/public/us/en/documents/guides/getting-started-with-hadoop-planning-guide.pdf