A method for data synchronization performed by a server is described. The method comprises receiving, from a client terminal, a synchronization request and information about a synchronization anchor of the client terminal; determining, based on the synchronization anchor of the client terminal and a synchronization anchor of the server, difference data to be synchronized with the client terminal; determining whether a size of the difference data exceeds a threshold; and responsive to determining that a size of the difference data exceeds the threshold, transmitting the difference data to the client terminal in a plurality of difference data segments, wherein a size of each of the plurality of the difference data segments does not exceed the threshold, and wherein each of the plurality of the difference data segments is to be synchronized separately with the client terminal.