A method is performed by two or more devices of a group of devices in a distributed data replication system. The method includes receiving, at the two or more devices, a group of chunks having a same unique temporary identifier, where the group of chunks comprises an object to be uploaded; creating an entry for the object in a replicated index, where the entry is keyed by the unique temporary identifier, and where the replicated index is replicated at each of the two or more devices; and determining, by an initiating device of the two or more devices, that a union of the group of chunks contains all data of the object. The method also includes calculating a content-based identifier to the object; creating another entry for the object in the replicated index, where the other entry is keyed by the content-based identifier; and updating the replicated index to point from the unique temporary identifier to the content-based identifier.