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by wilhuff 2692 days ago
It's probably better said that Cloud Firestore and Cloud Spanner share common infrastructure.

For example, Cloud Firestore uses TrueTime to provide similarly strong consistency guarantees to Cloud Spanner (see https://cloud.google.com/spanner/docs/true-time-external-con...)

I'm not aware of any whitepapers describing the listen feature that provides real-time updates.