Cloud bursting relates to hybrid clouds. The idea is that a given application normally runs in a private cloud or a local computing environment. If a situation arises where the application needs additional resource (computing power, storage, etc.), it can "burst" into the public cloud and use Cloud Computing for those additional resources.
Of course, this can add complexity to the application design. There are vendors that provide hybrid cloud solutions that facilitates taking advantage of cloud bursting.
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The Savvy Manager's Guide
Douglas K Barry is also the author of a book that explains Web Services, service-oriented architecture, and Cloud Computing in an easy-to-understand, non-technical manner.
Web Services, Service-Oriented Architectures, and Cloud Computing: The Savvy Manager's Guide (Second Edition)
by Douglas K Barry with David Dick
This is a guide for the savvy manager who wants to capitalize on the wave of change that is occurring with Web Services, service-oriented architecture, and—more recently—Cloud Computing. The changes wrought by these technologies will require both a basic grasp of the technologies and an effective way to deal with how these changes will affect the people who build and use the systems in our organizations. This book covers both issues. Managers at all levels of all organizations must be aware of both the changes that we are now seeing and ways to deal with issues created by those changes.