Abstract: An improved failure detector algorithm was demonstrated on the basis of fresh point. Using the historical probability of erroneous judgment to change the check time dynamically will increase the accuracy of failure detector in distributed network. A compared experiment of the basic failure detector algorithm, the algorithm on the basis of fresh point and the improved algorithm was conducted, showing that the improved algorithm will increase the accuracy of failure detector gradually in distributed system. 

Key words: distributed system, failure detector, fresh point, detector algorithm