Patent ID: 11954509
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 6:
7. A service continuation method of a service continuation system including an active system virtual server configured to provide a service through a network, a standby system virtual server configured to transmit a heartbeat to and from the active system virtual server and provide the service in a case where a heartbeat from the active system virtual server is stopped, and a coordination apparatus which is communicatively connected to the active system virtual server and the standby system virtual server, the service continuation method comprising:
at the active system virtual server,
providing the service,
determining that a heartbeat from the standby system virtual server is not received for a predetermined period of time;
notifying the coordination apparatus of the stopping of the heartbeat, and
reporting whether or not the service is operating to the coordination apparatus;
at the standby system virtual server,
receiving a restart instruction from the coordination apparatus;
executing a system restart, in response to receiving the restart instruction from the coordination apparatus, including (i) restart of the service of the standby system virtual server, and (ii) restart of an operating system of the standby system virtual server after the restart of the service of the standby system virtual server is not successful; and
at the coordination apparatus,
receiving, from the active system virtual server, (i) a notification of the stopping of the heartbeat, and (ii) a report indicating that the service is operating;
sending the restart instruction to the standby system virtual server,
determining that the restart of the operating system of the standby system virtual server fails, and
instructing a management system in a virtualization environment in which the standby system virtual server is operated to restart the standby system virtual server, thereby causing the standby system virtual server to be restarted.