FAULT TOLERANT SERVER, PROCESSOR SWITCHING METHOD, AND PROCESSOR SWITCHING PROGRAM

摘要

PPROBLEM TO BE SOLVED: To provide a fault tolerant server, a processor switching method and a processor switching program, for improving availability of a system. PSOLUTION: The fault tolerant server is provided with: duplexing control parts 104 and 204 for, when a failure occurs in a processor used by one system, isolating all the processors included in the system, and for transmitting failure occurrence notification to the other system; and CPU module parts 100 and 200 for, when receiving failure occurrence notification, transmitting an instruction to switch the processor to the system which has transmitted the failure occurrence notification. When receiving a switching instruction, the processor switching part switches the processor to be used by the system from the faulty processor to the other processor, and the duplexing control part causes the one system to store the information stored in the other system, and integrates all the isolated processors in the one system, and synchronizes the one system with the other system. PCOPYRIGHT: (C)2011,JPO&INPIT