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Data & Analytics · Advanced

Distributed Transaction

A transaction that spans multiple databases or nodes and must still be atomic across all of them.

Definition

Distributed transactions need coordination protocols such as 2PC or consensus algorithms like Paxos and Raft. Spanner provides globally consistent distributed transactions using TrueTime timestamps.

Exam tip

For relational, horizontally scalable, globally consistent transactions on Google Cloud, the answer is Spanner.

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