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Big data. Big data is a term for data sets that are so large or complex that traditional data processing application software is inadequate to deal with them. Big data challenges include capturing data, data storage, data analysis, search, sharing, transfer, visualization, querying, updating and information privacy.
Today big data is generated by machines, networks and human interaction on systems like social media, and the volume of data to be analysed is massive. Variety. Variety refers to the increasingly diversified sources and types of data requiring management and analysis. We used to store data from sources like spreadsheets and databases.