Overview of Big Data

1. Big Data is a collection of large datasets that cannot be processed using traditional computing techniques. It is not a single technique or a tool, rather it has become a complete subject, which involves various tools, techniques and frameworks.
2. Big Data could consist of
   1. Structured data
   2. Unstructured data
   3. Semi-structured data
3. Characteristics of Big Data:
   1. Volume
   2. Variety
   3. Velocity
   4. Variability
4. Examples of Big Data generation include stock exchanges, social media sites, jet engines, etc.