Illustrative embodiments present a computer-implemented method for controlling update of stored data in a set of data replicas. The computer-implemented method responsive to receiving a data request from a requester, identifies a data replica to resolve the data request to form an identified data replica. The computer-implemented method transmits an update data request to a replica administration agent if the data request is an update data request, determines whether an arbitration token is present, and responsive to a determination that the arbitration token is present; a replica administration agent updates the data in the identified data replica.