Big Data: Framework and issues

Nowadays, many industries and governments around the world are experiencing unprecedented increase in the volume, variety and velocity of information, due to the deployment of the new generations of mobile networks, increased use of smartphones, the explosion of numbers of subscribers, the multitude of services offered, online transactions and the rise of social media. These massive data is considered a gold mine that must be tapped to enjoy, to do this, Big Data proves the most appropriate technology. Big Data allows data analysis in immeasurable depths, highlights the hidden meanings in data tsunami, it brings up information by showing correlations, the underlying mechanisms of unsuspected associations and shows things in a new and unexpected angle. Business organizations using Big Data will differentiate themselves from their competitors, gain market share, achieve key objectives, increase revenue and benefit from new innovative services. This paper introduces Big Data technology along with its importance in the modern world and highlights its key fields and substantial issues. It also discusses Big Data tools (Hadoop and Spark) in detail and compares them according to several criteria. The paper concludes with big data's storage and privacy issues.