Database modelers, DBAs, security administrators, and Cx O managers all speak to the problems inherent in a "server sprawl" condition.
Consolidation implies change, and any kind of change to a production or development environment has the potential to disrupt operations.
Of course, whichever type of consolidation you choose to practice, physical or logical, you'll have to make changes to each of the separate application UIs.
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This is the first type of consolidation that most DBAs undertake; the risk of disruption is minimal because you're moving the database in its entirety, without changing anything at the logical level.
The gains in server utilization and the cost savings that result from the reduction in hardware can be substantial.
The actor symbols on the left side of Figure 1 represent the field users—project managers, project coordinators, and field supervisors—and the actor on the right represents the office staff that gathers statistics and generates reports. To consolidate all these databases, you'll want to analyze the schema of each of the databases.
Each one of the databases that you see in Figure 1 is composed of a set of interrelated tables.
There's a high probability that you'll be defining new keys—primary and foreign—and new indices to enhance performance.