Understanding the Concepts
Within the context of this book, the term migration is defined as the transition of an environment's people, processes, or technologies from one implementation to another. While somewhat open ended, this definition allows us to discuss migration in a number of different contexts:
The migration of common off-the-shelf (COTS) software from one platform to a larger or smaller similar platform
The migration of data from one database to another, possibly similar data storage technology
The migration of a custom-written application from one platform to a different platform and operating environment
These examples have different inputs, different execution strategies, and dissimilar functional outcomes, but they are all migrations ...
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