Patent ID: 8407519

Claim:
A method for remedying system trouble in virtual servers, comprising the steps of: in a managing server using a snapshot-appended information table which stores management information for managing snapshots of a virtual server, a setting change table which stores setting change information on the virtual server, and a policy table which stores policies to be satisfied by the virtual server, in accordance with a rollback request received together with a rollback time, acquiring the management information of a snapshot of the virtual server, the snapshot being acquired before the rollback time, from the snapshot-appended information table; acquiring the setting change information which is set between a time of acquiring a snapshot and the rollback time, from the setting change table; selecting a setting change information that coincides with a policy stored on the policy table, from the acquired setting change information; determining a snapshot to be used on a rollback, by referring to the acquired management information of the snapshot; and changing the selected setting change information corresponding with the determined snapshot, and rolling back the virtual server according to a changed snapshot.