A Comparative Study on Operational Database, Data Warehouse and Hadoop File System

A Computer database is a collection of logically related data that is stored in a computer system,so that a computer program or person using a query language can use it to answer queries. An operational database (OLTP) contains up-to-date, modifiable application specific data. A data warehouse (OLAP) is a subject-oriented, integrated, time-variant and non-volatile collection of data used to make business decisions. Hadoop Distributed File System (HDFS) allows storing large amount of data on a cloud of machines. In this paper, we surveyed the literature related to operational databases, data warehouse and hadoop technology.