Abstract — Amazon’s Simple Storage Service (S3) is a storage utility that bundles at a single pricing point three storage system characteristics: high data durability, high availability, and high-speed data access. Many applications, and scientific applications in particular, do not need all these three characteristics bundled together. We argue that unbundling offers an opportunity to provide acceptably-priced storage and that future storage utilities designed to support science communities can offer multiple classes of service without introducing hidden, complexity-related costs. I
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