Datastore can be created in multi-region configurations. This is deployed over multiple regions in a single continent/nearby geographic areas, e.g. USA, Europe, and Asia. Google Cloud Storage has the same features.
We have a series of locations that determine replication topology, but you cannot do à la carte region selection at this time. Under the hood we run on at least 3 independent private super fast network fabrics between regions, so we have a pretty high bar infrastructure wise for deployments. We bet on having reliable high-grade deployments and Google's world wide network to get requests to users faster rather than stretching out arbitrary deployments. Seems to work so far for customers like Snap & Niantic Labs (Pokemon GO), but YMMV.
How does this work? Is the Datastore data available locally in every region? Docs don't make this clear.
We were looking for something like DocumentDB that has replication to any region you want to run in.