Every day, we create 2.5 quintillion bytes of data so much that 90% of the data in the world today has been created in the last two years alone. This data comes from everywhere: sensors used to gather climate information, posts to social media sites, digital pictures and videos, purchase transaction records, and cell phone GPS signals to name a few. This data is big data.
Big data spans four dimensions: Volume, Velocity, Variety, and Veracity.
Volume: Enterprises are awash with ever-growing data of all types, easily amassing terabytes