As the number of data warehouses at least one terabyte in size has grown from 21 percent in 2002 to 43 percent of enterprises in 2004, many have asked Forrester: Is it feasible to back up the database?1 Complaints have included: 1) the backup won't fit in our batch window, 2) we don't have a batch window, and 3) the mean time between failures (MTBF) of modern storage technology is better than ever - do we need a backup at all? The answer is unless the system is of no consequence to the business (in which case, why is it in operation?), a periodic backup must be made based on the time horizon in which the business process functions.
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