CloudKit actually does this. https://www.vldb.org/pvldb/vol11/p540-shraer.pdf https://www.vldb.org/pvldb/vol11/p540-shraer.pdf > within each container CloudKi

CloudKit actually does this. https://www.vldb.org/pvldb/vol11/p540-shraer.pdf https://www.vldb.org/pvldb/vol11/p540-shraer.pdf > within each container CloudKit uniquely divides the data- space into many private databases that manage user-scoped data > Each private database belongs to exactly one container and one user