Method and apparatus for restarting a computing system
Asynchronous checkpointing system for error recovery
Error recovery system of a multiprocessor system for recovering an error in a processor by making the processor into a checking condition after completion of microprogram restart from a checkpoint
Method and apparatus for database update/recovery
Apparatus and method for providing recoverability in mass storage data base systems without audit trail mechanisms
Fault-tolerant distributed database system and method for the management of correctable subtransaction faults by the global transaction source node
Method for managing database recovery from failure of a shared store in a system including a plurality of transaction-based systems of the write-ahead logging type Patent #: 5280611
ApplicationNo. 701816 filed on 05/17/1991
US Classes:707/202, Recoverability714/16Forward recovery (e.g., redoing committed action)
ExaminersPrimary: Ray, Gopal C.
Attorney, Agent or Firm
International ClassesG06F 015/40
Foreign Application Priority Data1987-04-20 JP
AbstractIn a composite subsystem having a plurality of data base systems and data communication on a plurality of processors, a composite subsystem controller unifies other data base systems of the composite subsystem and distributed data base systems, and, at the occurrence of a fault in some subsystem, allows other subsystems to operate continuously, thereby facilitating the recovery after the faulty subsystem has started up, and makes management 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 earlier than the check point is eliminated, and a check point dump is acquired without waiting for the end of transaction which has been active at the check point.