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The previous KDnuggets Poll asked:

What was the largest database or dataset you data-mined?

Based on the votes, the estimated median value for the largest DB data mined is around 10 GB, smaller than 30-60 GB range in 2007 poll.

One explanation is that fewer people participated in 2008 poll (perhaps Yahoo data miners who mine some of the largest data anywhere were distracted by the Microsoft takeover bid and did not take part in this poll).

We also did a regional analysis, with values in US/CA/Au, W. Europe, and Asia regions are close to what we expected, but unusual responses in E. Europe, Latin America, and Middle East.

Here are full results of 2008 KDnuggets Poll: Largest Database or Dataset You Data-Mined.