Determining the best database for a modern application to be deployed across multiple data centers requires careful evaluation to accommodate a variety of complex application requirements. The database will be responsible for processing reads and writes in multiple geographies, replicating changes among them, and providing the highest possible availability, consistency, and durability guarantees. But not all technology choices are equal. For example, one database technology might provide a higher guarantee of availability while providing lower data consistency and durability guarantees than another technology. The tradeoffs made by an individual database technology will affect the behavior of the application upon which it is built.

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