Daffodil International University
Digital world is growing very fast and become more complex in the volume (terabyte to petabyte), variety (structured and un-structured and hybrid), velocity (high speed in growth) in nature. This refers to as 'Big Data' that is a global phenomenon. This is typically considered to be a data collection that has grown so large it can't be effectively managed or exploited using conventional data management tools: e.g., classic Relational DataBase Management systems (RDBMS) or conventional search engines. To handle this problem, traditional RDBMS are complemented by specifically designed a rich set of alternative DBMS; such as - NoSQL, NewSQL and Search-based systems.