DFSM Design for Remote Logical Volume Replication System

This paper presents a DFSM(deterministic finite state machine) for both primary and backup sub-system of the disaster tolerance system.A log volume is applied in the backup system to guarantee the data consistency in DCM process and the cyclic DCM process enhances the system′s speed of response.It is proved that the mechanism and the state machine can effectively lower down the complexity of the system,guarantee the right state,data consistency and high availability of the system.