High availability server systems, disaster recovery method of high availability server systems and high availability server,

摘要

PPROBLEM TO BE SOLVED: To provide a highly available server system that reduce the time required for state synchronization and reduces probability of double trouble, and to provide a fault recovery method of the highly available server system, and highly available servers. PSOLUTION: In the highly available server system 100 achieving redundancy by connecting a plurality of highly available servers 1 through communication lines, each highly available server 1 includes a state management area 311 for storing state information required for redundancy in a memory 31. The highly available server 1 is virtualized by arranging a hypervisor 20 between an OS 12 and a hardware 30. When a fault occurs in the highly available server 1 (1a), a state management part 112 in a service processing part 11 acquires final updating time of the state management area 311, and acquires state information updated after the final updating time from a state management area 311 of another highly available server 1 (1b) that has taken over the processing, to update the state management area 311 thereof. PCOPYRIGHT: (C)2011,JPO&INPIT