Companies such as Oracle and Teradata created a $30 billion market for databases that analyze structured information, but companies including Hadoop might steal some of the market with services that can understand unstructured information including tweets and Web traffic. Oracle and Teradata systems aren't dynamic enough to handle nonstandardized and inconsistent Web data, according to this report. Flexibility in scale and software might help Hadoop increase its sales from $77 million in 2011 to $800 million by 2016, IDC analyst Carl Olofson says.

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