Redundant system and hardware failure detection method

摘要

To provide a hardware failure detection method capable of rapidly detecting a failure and having a small risk of false detection and a small monitoring load, for a redundant system.SOLUTION: In a redundant system 1 configured by including a host OS 21 that runs on a plurality of computers 2, each virtual machine 23, and duplex configuration applications executed by the virtual machine 23, a host OS monitoring unit 31 that monitors activity/inactivity of each host OS 21, and a representative application selecting unit 32 for selecting a representative application executed by the virtual machine 23 on the host OS 21, when it detects that the response of the host OS 21 has been interrupted, furthermore, for selecting a corresponding application to be paired, and an application state confirmation unit 33 for confirming whether a status of the selected corresponding application is in single-system operation or not, are provided.SELECTED DRAWING: Figure 1