Patent ID: 7779297
Filing Date: 2010-08-17
Classification: G06F

Abstract:
1. A fail-over method employed for a computer system including an active server for executing an application for executing a job; a disk array apparatus having a start-up disk used for the active server; a backup server for executing the application instead of the active server when an error occurs in the active server, thereby taking over execution of the job; and a management sever for managing the active server and the backup server; the backup server having a first processor and a first memory, the first memory storing a program for dividing the first processor logically, and the logically divided first processor being allocated to create a logical partition, the fail-over method comprising: a first step for obtaining, by the management server, configuration information of the active server and creating a logical partition in the backup server so as to correspond to the active server according to the obtained configuration information; a second step for starting up, by the backup server, the created logical partition; a third step for releasing, by the backup server, allocation of the first processor to the logical partition to stop the operation of the logical partition when the created logical partition in the backup server reaches a predetermined state; a fourth step for detecting, by the management server, an error that occurs in the active server; a fifth step for stopping, by the management server, upon error detection in the active server, the active server in which error is detected; a sixth step for searching, by the management server, the logical partition having same configuration as the active server in which error is detected; and a seventh step for requesting, by the management server, allocation of the first processor to the searched logical partition to start up the logical partition, wherein the predetermined state referred to in the third step is a state in which a start-up monitoring module of an operating system has received a request of reading data stored in the start-up disk from the started-up logical partition, and wherein the third step includes a step of requesting, by the start-up monitoring module of the operating system, to release allocation of the first processor to the logical partition.