We envision a new architecture of databases that dramatically reduces administration costs while managing a large scale data reliably. The key is to provide data management capability as a service. This vision, called CloudDB, is along with the current trend of "Cloud Computing" that allows users to access IT-related services in the cloud without the knowledge of the underlying technology infrastructure. Cloud Computing is a fundamentally different computing model and traditional data management systems are not designed to work in this new environment. Consequently, data management in cloud computing raises particularly challenging problems, which call for pioneering technology development and innovative solutions.