Patent ID: 6470462
Filing Date: 2002-10-22
Classification: G06F

Abstract:
A redundant system comprising:a first unit and a second unit each including plural state machines for performing tasks, at least some of the state machines provided at the first unit simultaneously performing same tasks as at least corresponding ones of some of the state machines provided at the second unit; a synchronization server which receives a resynchronization request from a resync requesting state machine of the second unit and thereupon provides an out-of-synchronization indication to a corresponding state machine of the first unit; wherein in response to the out-of-synchronization indication from the synchronization server, the corresponding state machine of the first unit generates a resynchronization request; wherein in response to the resynchronization request from the state machine of the first unit, the synchronization server issues a resynchronization command to both the corresponding state machine of the first unit and the resync requesting state machine of second unit; wherein the resync requesting state machine of second unit and the corresponding state machine of the first unit simultaneously resynchronize in response to the resynchronization command.