Patent ID: 8301773

Claim:
A computer-readable recording medium having recorded a server management program for grouping and managing a plurality of server computers in server groups, the server management program causing a computer to perform a procedure comprising: collecting disk image data from a server computer included in each of the server groups and storing the disk image data in a first memory; obtaining from the first memory, in response to an instruction to add a server computer of the server computers to an addition-target server group of the server groups, the disk image data collected from the addition-target server group; storing the obtained disk image data in the server computer to be added, wherein the disk image data includes data of an operating system on which a server application for providing a service to the server computers is incorporated, and wherein the storing stores the disk image data in a system volume differing from a system volume which has already been provided in the server computer to be added; storing in a second memory, for each server group, unique information of the server computers in other server group which have a processing request relationship with the server computers in said each server group; setting up, by consulting the second memory, the unique information of a mating server computer having a processing request relationship, in the server computer to be added, and further setting up the unique information of the server computer to be added in the mating server computer having the processing request relationship with the server computer to be added; outputting, according to a schedule table in which a server group that should include a server computer of the server computers for a period of time is determined in advance, an instruction to switch the server group at the time when the group that includes the server computer is changed; and reactivating the server computer for which the server group is changed, from a system volume corresponding to the server group to which the server computer belongs after the switching, according to the instruction that is outputted.