类似的数据库还有Google的Spanner。

参考：官网说明

　　　另一个介绍

Key capabilities

As a globally distributed database service, Azure Cosmos DB provides the following capabilities to help you build scalable, globally distributed, highly responsive applications:

• Turnkey global distribution

  • Your application is instantly available to your users, everywhere. Now your data can be too.
  • Don‘t worry about hardware, adding nodes, VMs or cores. Just point and click, and your data is there.

• Multiple data models and popular APIs for accessing and querying data

  • Support for multiple data models including key-value, document, graph, and columnar.
  • Extensible APIs for Node.js, Java, .NET, .NET Core, Python, and MongoDB.
  • SQL and Gremlin for queries.

• Elastically scale throughput and storage on demand, worldwide

  • Easily scale throughput at second and minute granularities, and change it anytime you want.
  • Scale storage transparently and automatically to cover your size requirements now and forever.

• Build highly responsive and mission-critical applications

  • Get access to your data with single digit millisecond latencies at the 99th percentile, anywhere in the world.

• Ensure "always on" availability

  • 99.99% availability within a single region.
  • Deploy to any number of Azure regions for higher availability.
  • Simulate a failure of one or more regions with zero-data loss guarantees.

• Write globally distributed applications, the right way

  • Five consistency models models offer strong SQL-like consistency to NoSQL-like eventual consistency, and every thing in between.

• Money back guarantees

  • Your data gets there fast, or your money back.
  • Service level agreements for availability, latency, throughput, and consistency.

• No database schema/index management

  • Stop worrying about keeping your database schema and indexes in-sync with your application’s schema. We‘re schema-free.

• Low cost of ownership

  • Five to ten times more cost effective than a non-managed solution.
  • Three times cheaper than DynamoDB.

Cosmos DB