I. Introduction
The current information society has entered the era of big data. In March 2012, the United States government issued a “big data research and development initiative” [1], launched a $200 million investment big data development plans. The U. S. government's plan is seen as another major move in the field of information after the u.s‥ Big data, referred to by the conventional software tools in a certain range of time capture, management and processing of data, is the need for new processing mode to have a stronger decision-making ability, insight discovery and process optimization capabilities of massive, high rates of growth and diversification of information assets. Big data 5V features (IBM): Volume (large), Velocity (high speed), Variety (diversity), Value (low value density), Veracity (authenticity).