https://cloud.google.com/datastore/ https://cloud.google.com/datastore/ I haven't used it in a few years, but from what I remember you could have ACID like ope

https://cloud.google.com/datastore/ https://cloud.google.com/datastore/ I haven't used it in a few years, but from what I remember you could have ACID like operations on grouped entries because grouping them makes their physical storage the same so ACID transaction becomes a localized operation.