SQL Server Data Services (SSDS) are highly scalable, on-demand data storage and query processing utility services. Built on robust SQL Server database and Windows Server technologies, these services provide high availability, security and support standards-based web interfaces for easy programming and quick provisioning.SSDS homepage : http://www.microsoft.com/sql/dataservices/default.mspx
It's a Highly Scalable web facing data storage. and SSDS data model really takes after google's BigTable.
* Container: Set of entities
* Entity : Flat scalar property bags
* Property name/value pairs