See Jim O'Neil's post detailing the
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NoSQL databases are often employed in public, massively scaled Web site scenarios, where fast fetching of relatively simple data sets matters most.
NoSQL provide some or all of the following features:
This post describes the main features of NoSQL, provides some general guidance on when to use NoSQL, and how you can get started using NoSQL on Windows Azure. I’ll go in depth on how you can use MongoDB and sones GraphDB in your Azure application, and explain how you can get started with those technologies. I’ll also explain how two Azure offerings fit some NoSQL traits.