When it comes to data warehousing, the big are getting bigger. Gartner predicts that the average enterprise will manage 100 terabytes of data by 2005 and some big corporations as much as 500 terabytes. The number of enterprise data warehouses storing more than one terabyte of data is also expected to increase from 200 in 1999 to 3,200 in 2203. "The issue of scalability within the corporate information infrastructure is driven not only by the volume of the data, but the business applications and operations that create and utilize the data," says Henry Morris, an IDC vice president.

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