In Cloud Spanner, which consistency model does it provide across multiple regions?

Question

Google Cloud (GCP) — Hard

In Cloud Spanner, which consistency model does it provide across multiple regions?

Accepted Answer

Cloud Spanner's consistency model is rooted in its ability to provide strong external consistency using TrueTime, ensuring that data remains consistent across multiple regions. This is achieved through a highly synchronized clock system. In contrast, other options lack this level of synchronization. Eventual consistency, for instance, may lead to temporary inconsistencies.