Data processing method, devices and system

The embodiment of the invention provides a data processing method and relates to the field of computer storage. A conflict between a read object and a deletion object is avoided to a certain degree. The method comprises the steps that a container server in an object storage system receives a deletion query message sent by a proxy server, wherein the deletion query message comprises identificationinformation of a container to which a first target object belongs and the identification information of the first target object; the container server queries position information of the first target object in an object list of the container server according to the identification information of the container to which the first target object belongs and the identification information of the first target object; if the position information of the first target object is queried in the object list, the container server deletes the position information of the first target object in the object list and writes the position in