| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance availability upon a recover from failure. <P>SOLUTION: The computer system comprises: a plurality of servers connected to an external disk device on a network; and a logical part mechanism that establishes one or more logical parts on each server, in which the logical part boots an operating system through the boot disk in the external disk device. When a failure occurs on the server in operation of a task and when taking over the operation from the computer system, only the logical part affected by the failure is subjected to a fail-over. The fail-over method comprises the steps of: detecting a server on which a failure occurs 921; determining a failed part ; determining a logical part which is affected by the failure of the failed part 924; aborting of the logical part 912; searching a spare server which takes over the operation from the computer system 926; establishing a logical part which is affected by the failure in the spare server 952; taking over the boot disk of the logical part which is affected by the failure in the established logical part 941; and starting up the established logical part 953. <P>COPYRIGHT: (C)2012,JPO&INPIT |
