Abstract: This paper designs and implements a remote disaster tolerant system, the system uses a structure which combines local tolerant system with remote tolerant system, separates services and storage, it uses local control center as event processing center and data forwarding cache. In addition, it schemes with synchronization and asynchronism for data backup, ensures data integrity and reliability, it uses staged deployment failure detection to detect system, and uses dynamic failure detection algorithm to reduce the erroneous decision and accelerate the speed of service restoration. Through tests, the system’s data recovery and service switching have been significantly improved. In practical application, the system runs stable, performs well and reaches a high level of disaster tolerant system requirements.

Key words: remote disaster tolerant, failure detection, data recovery, service switch