In this research work, the evaluation of the criteria, components or characteristics offered by the three main DBaaS providers in the cloud was carried out: Google Cloud Platform (GCP), Microsoft Azure and Amazon Web Services (AWS), in relation to the offer of Database as a service (DBaaS) for PostgreSQL, in order to determine which is the best DBaaS option for an information system with a database in the cloud; An information system with DBaaS is developed as a case study to support the research, where the use of a methodology based on research and technological development is proposed. The DBaaS criteria, components, or features that were evaluated were availability, security, capacity, quick elasticity, performance, support, and cost. It is concluded that Azure DBaaS for PostgreSQL through a flexible server is the most appropriate DBaaS provider for the case study developed.
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