When discussing GCP, the latency between AZs within the same region is approximately 5 ms. Thus, if you have a 3-node database cluster spanning 3 AZs (all within the same region), a transaction can be committed in the 5-10ms range using Raft. CockroachDB should handle this seamlessly.

However, if you're considering a multi-region setup, the latency will depend on the distance between the regions.That's why usually you define a preferred region (that stores primary copy of the records) or deploy in a geo-partitioned mode (when data is automatically pinned to configured regions).