خرید و دانلود نسخه کامل کتاب Practical Data Migration – Original PDF

WHAT IS THE PURPOSE OF THIS BOOK AND WHO SHOULD READ IT? This book is designed as a teach-yourself guide to data migration. It is written by a consultant with many years’ experience in data migration to give you a series of steps, developed in real-life situations, that will get you from an empty new system to one that is populated, working and backed by the user population. There are two types of reader who will find this book essential – the executive and the practitioner. The executive will be the person sponsoring the bigger programme of which this a part, and signing off on the shutting down of existing systems and cutover to new ones. You may be a practising or a lapsed technologist or you may have no technological experience at all, but you want to know how to control a data migration project. The practitioner is the technologist with the prospect of delivering a looming data migration project and sensibly reaching for assistance. You could also be a practitioner who is interested in moving into this area of activity. WHAT TYPE OF DATA MIGRATION IS COVERED? Data migration projects take on many forms. The classic one is where a new system is to be implemented and needs to be primed with data from the legacy systems. This I call an enterprise application migration: the scale of the transformation is one of reengineering a significant function of an organisation or the whole organisation. There are also system consolidation programmes, either spawned by businesses merging or by a drive for standardisation. There are system upgrades, and these also require data migration. However, whatever the spur for data migration, the same problems will have to be faced, and this book will guide you past the pitfalls. For the sake of simplicity and consistency, unless there is a specific reason to indicate differing approaches for different types of data migration, I am going to refer to the old/existing data as the ‘legacy’ and the destination as the ‘target’.