In the last two decades, most business analyzes have been created using structured data extracted from operating systems and consolidated in a data warehouse. Big Data greatly increases the amount of data sources and the variety and volume of data useful for analysis. A high percentage of this data is often described as multi structured to distinguish it from the structured operational data used to fill a data warehouse. In most organizations, multi-structured data increases significantly faster than structured data. The two main trends in data management for big data processing are relational DBMS products optimized for analytic workloads) and unrelated workloads. A non-relational system can be used to produce a large data analysis or to process large data before consolidation in a data warehouse. how much impotrned is to Managing Big data ?