Abstract：Big Data TechnologyBig Opportunity for Librarians Introduction In todays scenarioa large amount of information needs to be processed to make a viable conclusion in a library or in any communityThis informationreferred as Big datais collected from various sources like socialgeospatialinternetetcand can even be directly provided by a humanThis data is churned and complex algorithms are applied to make use of this dataAccess to Big Data allows business respond to the environment and it is becoming a key to creating competitive advantages in a complex and rapidly changing marketsBig data is a broad term used to describe a massive volume of both structured and unstructured data that is so large it is difficult to process using traditional database and software techniquesThey are extremely large data sets that may be analyzed computationally to reveal patternstrendsand associationsespecially relating to human behavior and interactionsAnalysis of big data to reveal modetrendand associationwhich is related to the scope of data exploration