Particularly in massive scale and high concurrency applications, like search engines and SNS, using the relational database to store and query dynamic user data has appeared to be inadequate. At the side of the event of the web and cloud computing, there would like knowledge bases to be able to store and method massive data effectively, demand for top performance once reading and writing, therefore the ancient computer database is facing several new challenges. This can be usually thought-about to be information from a knowledge of an information assortment that has fully grown thus massive it can't be effectively managed or exploited victimization standard data management tools: e.g., classic relational database management systems (RDBMS) or standard search engines. This refers to as 'Big Data' that's a world development.

Digital world is growing in no time and become a lot of complicated within the volume (terabyte to petabyte), variety (structured and un-structured and hybrid), speed (high speed in growth) in nature.

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