warehoused data, metadata, and other data residing in ridiculously large files. Media/entertainment,
healthcare, and video surveillance are obvious examples of new segments of big data growth. Social
media solutions such as Facebook, Foursquare, and Twitter are the newest new data sources.
Essentially, they have built systems where consumers (consciously or unconsciously) are providing
near continuous streams of data about themselves, and thanks to the "network effect" of successful
sites, the total data generated can expand at rapid logarithmic rates.
http://www.emc.com/collateral/analyst-reports/idc-extracting-value-from-chaos-ar.pdf
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