In the Network Management System（NMS） of communication networks

disaster tolerance technologies are usually used to ensure high system reliability and data synchronization is one of them.To implement highly efficient data synchronization

it is necessary to optimize the characteristics of the data to be synchronized.Taking the master-slave synchronization functions of FiberHome OTNM2000 transmission network management system as an example

this article introduces the principles of several data comparison algorithms and their applications in the master-slave synchronizationverifies process

which is of some reference values to the optimization of similar data synchronization or remote data backup technologies.