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In the era of data explosion and big data, it is a challenging task for the data managers or data analysts to store and process big data for analysis and visualize it. Big data imposes many challenges and libraries to have big data which can be analyzed to bring new insights which will help in managing the library and its services better. The present study shows the traces of big data in libraries and how library big data can be used as an opportunity to serve the patrons better. The present study advocates the use of the Apache Hadoop framework and ecosystem in the libraries to solve the challenges of big data in libraries. This paper talks about the features and problems of big data and the basic concepts behind Apache Hadoop and its components for solving such problems. Libraries/Librarians can assist researchers in handling big data by providing them with data curation and cleaning services.