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Cloud Spanner is Google Cloud's globally distributed, strongly consistent, relational database service. It combines the structure and query capabilities of a traditional relational database with the horizontal scalability of a NoSQL system. Spanner is designed for mission-critical applications that require global distribution, strong consistency, and five-nines availability.
Cloud Spanner is a fully managed, horizontally scalable relational database that provides:
Spanner's secret weapon is TrueTime, a globally synchronised clock system based on GPS receivers and atomic clocks in every Google data centre. TrueTime gives Spanner a precise, bounded notion of time across the globe, enabling it to order transactions consistently without the performance penalty of traditional distributed locking.
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