Distributed data base system of composite subsystem type, and method fault recovery for the system
November 12, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3736566 3838260 Automatic fault detection and recovery system which provides stability and continuity of operation in an industrial multiprocessor control Apparatus for recovery from failures in a multiprocessing system Distributed fault isolation and recovery system and method Associative data access method (ADAM) and its means of implementation Computer system fault recovery based on historical analysis Method and apparatus for restarting a computing system Optimistic recovery in a distributed processing system Asynchronous checkpointing system for error recovery InventorsAssigneeApplicationNo. 184075 filed on 04/20/1988US Classes:714/20Plural recovery data sets containing set interrelation data (e.g., time values or log record numbers)ExaminersPrimary: MacDonald, Allen R.Assistant: Ray, Gopal C. Attorney, Agent or FirmInternational ClassG06F 011/00AbstractIn a composite system in which a plurality of data base systems and data communication are treated as respective subsystems. At the occurrence of a fault in one subsystem, other subsystems are allowed to operate continuously, thereby facilitating recovery after a faulty subsystem has started up. A controller performs as to which data base system a transaction in execution has accessed so that the range of failure is confined, thereby facilitating the fault recovery. The check points of two processings including updating of information in the memory and accumulation of the updated information in the journal are detected so that the need of journals for information occurring earlier than the check point is eliminated, and a check point dump is acquired without waiting for the end of a transaction which has been active at the check point. | |
