It is possible but difficult at scale. https://dl.acm.org/doi/pdf/10.1145/112600.112601 https://dl.acm.org/doi/pdf/10.1145/112600.112601 https://cloud.google.

It is possible but difficult at scale. https://dl.acm.org/doi/pdf/10.1145/112600.112601 https://dl.acm.org/doi/pdf/10.1145/112600.112601 https://cloud.google.com/spanner/docs/true-time-external-consistency https://cloud.google.com/spanner/docs/true-time-external-con...