| 摘要 |
Fault tolerant computer system and method requiring reduced inter-unit communications. A primary system is arranged to execute event processes in response to received commands. Each time the execution of an event process i s halted, due to normal termination or an interrupt, an event generator generates an event message indicating the type of event process and the reas on or timing for halting the event process. The event message is used to instru ct a backup system to execute the same event process. Since the event message also specifies the reason and the timing for halting the event process, the execution of the event process can be replicated at the backup system. Thus, the primary system and the at least one backup system will be synchronized. At least one standby system may be provided for recording in an event log the sequence of event messages, and for storing an archive copy of memory conten ts of the primary system. The event log with the archive copy may be used to restore the system state of the primary system.
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