Cloud-based distributed databases are a popular choice for many current applications, especially those that run over the Internet. By incorporating distributed database systems within cloud environments, it has enabled businesses to scale operations to a global level, all while achieving desired standards of system reliability, availability, and responsiveness. Cloud providers offer infrastructure and management tools for distributed databases as Database-as-a-Service (DBaaS), re-purposing the investment by businesses towards database services. This paper reviews the functionality of these services, by highlighting Amazon Relational Data Service (RDS), suited for handling relational distributed databases.

翻译：基于云的分布式数据库是当前众多应用（尤其是互联网运行的应用）的热门选择。通过将分布式数据库系统融入云环境，企业得以实现全球范围内的运营扩展，同时满足系统可靠性、可用性和响应性的理想标准。云服务提供商以数据库即服务（DBaaS）的形式提供分布式数据库的基础设施及管理工具，将企业的投资重新导向数据库服务。本文通过重点介绍适用于处理关系型分布式数据库的Amazon关系型数据服务（RDS），综述了这些服务的功能特性。