RECOVERY SERVER FOR RECOVERING MANAGED SERVER

• US 20090282284A1
• Filed: 05/08/2009
• Published: 11/12/2009
• Est. Priority Date: 05/09/2008
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Kaoru, Miyamoto, NAOHIRO, Tamura, Sawao, Iwatani
• Granted Patent: US 8,090,975 B2
• Time in Patent Office: Days
• US Class Current: 714/4
• CPC Class Codes: G06F 11/1417 Boot up procedures
• CPC Class Codes: G06F 11/2005 using redundant communication controllers
• CPC Class Codes: G06F 11/2007 using redundant communication media
• CPC Class Codes: G06F 11/201 between storage system components
• CPC Class Codes: G06F 11/2028 eliminating a faulty processor or activating a spare
• CPC Class Codes: G06F 11/2035 without idle spare hardware
• CPC Class Codes: G06F 11/2046 where the redundant components share persistent storage G06F11/2043 takes precedence

Abstract

When the boot monitoring unit receives, from a management server, a first boot response for a first boot request from a NIC1 of a managed server, a boot monitoring unit stores a receiving time of the first boot response. When the boot monitoring unit receives a second boot request from a NIC2 of the managed server, and when a predetermined time has not elapsed from the receiving time, the boot monitoring unit determines that the management server is normal, and transmits an NOP program to the managed server. When the predetermined time has elapsed from the receiving time, the boot monitoring unit determines that the management server is stopped, and transmits a recovering program to the managed server.

Claims

1. A recovery server connected to a management server and a plurality of managed servers through a management network, the recovery server comprising:

a recovery management table storing an address of a first communicating unit transmitting a first boot request and an address of a second communicating unit transmitting a second boot request, the first boot request being a request for a first boot and the second boot request being for a second boot in the managed server in which priority order is set in order of the first boot, the second boot, and a storage area network (SAN) boot;

a monitoring unit monitoring a first boot response which is a response for the first boot request from the managing server; and

a storing unit storing an NOP program not executing a recovering process, and a recovering program executing the recovering process,

wherein, when the monitoring unit receives the first boot response from the management server, the monitoring unit stores a receiving time in the recovery management table, and

wherein, when the monitoring unit receives the second boot response from the managed server and when a predetermined time has not elapsed from the receiving time stored in the recovery management table, the monitoring unit determines that the management server is normal, and transmits the NOP program to the managed server, and when the predetermined time has elapsed, the monitoring unit determines that the managing server is stopped, and transmits the recovering program to the managed server.

2. The recovery server according to claim 1, wherein, in the managed server which is the transmission destination, the recovering program obtains a new unique ID by decoding a value obtained by previously encoding a unique ID in a storage area network used by the managed server.

3. The recovery server according to claim 1, wherein, when the second boot request from the managed server is received, and before transmitting the NOP program or the recovering program, the monitoring unit determines whether or not the recovery server is normal, and when the recovery server is not normal, the monitoring unit outputs information indicating that the recovery server is not normal.

4. A computer readable storage medium storing a recovery processing program to cause a computer to execute operations, the computer being a recovery server connected to a management server and a plurality of managed servers through a management network, the operations comprising:

storing, in a recovery management table, an address of a first communicating unit transmitting a first boot request and an address of a second communicating unit transmitting a second boot request, the first boot request being a request for a first boot and the second boot request being for a second boot in the managed server in which priority order is set in order of the first boot, the second boot, and a SAN boot;

monitoring a first boot response which is a response for the first boot request from the managing server;

storing a receiving time in the recovery management table when the recovering server receives the first boot response from the managing server;

determining that the managing server is normal, and transmitting an NOP program not executing a recovering process to the managed server when the recovering server receives the second boot response from the managed server, and when a predetermined time has not elapsed from the receiving time stored in the recovery management table; and

determining that the management server is stopped, and transmitting a recovering program executing the recovering process to the managed server when the recovery server receives the second boot response from the managed server, and when a predetermined time has elapsed from the receiving time.

5. A computer system including a management server, a recovery server, a plurality of managed servers, and a management network connecting the management server, the recovery server, and the plurality of managed servers, the computer system comprising:

a managed server further comprising;

a boot priority order setting unit setting priority order in order of a first boot, a second boot, and a SAN boot;

a first communicating unit transmitting a first boot request which is a request for the first boot;

a second communicating unit transmitting a second boot request which is request for the second boot; and

a boot requesting unit issuing the first boot request from the first communicating unit, and issuing the second boot request from the second communicating unit,

a management server further comprising;

a storing unit storing a boot processing program executing a booting process in the managed server; and

a transmitting unit transmitting the boot processing program to the managed server when the managing server receives the first boot request from the managed server, and

a recovery server further comprising;

a recovery management table storing an address of the first communicating unit transmitting the first boot request, and an address of the second communicating unit transmitting the second boot request;

a monitoring unit monitoring a first boot response which is a response for the first boot request from the managing server; and

a storing unit storing an NOP program not executing a recovering process, and a recovering program executing the recovering process,

wherein, when the monitoring unit receives the first boot response from the managing server, the monitoring unit stores a receiving time in the recovery management table, and

wherein, when the monitoring unit receives the second boot response from the managed server and when a predetermined time has not elapsed from the receiving time stored in the recovery management table, the monitoring unit determines that the managing server is normal, and transmits the NOP program to the managed server, and when the predetermined time has elapsed, the monitoring unit determines that the managing server is stopped, and transmits the recovering program to the managed server.

6. The computer system according to claim 5, wherein, when the first boot request from the managed server is received, the transmitting unit transmits the first boot response, which is a response for the first boot request, to the management network.

7. The computer system according to claim 6, wherein, when the first boot request from the managed server is received, and before transmitting the first boot response, the transmitting unit determines whether or not the management server is normal, and when the management server is not normal, the transmitting unit outputs information indicating that the management server is not normal.

8. The computer system according to claim 7, wherein the management server includes a server managing unit managing a plurality of the managed servers, and when the first boot request from the managed server is received, and before transmitting the first boot response, the transmitting unit determines whether or not the server managing unit is normal, and when the server managing unit is not normal, the transmitting unit outputs information indicating that the server managing unit is not normal.

9. The computer system according to claim 8, wherein, when the server managing unit is not normal, the transmitting unit restarts the server managing unit.

10. The computer system according to claim 5, wherein, when the second boot request from the managed server is received, and before transmitting the NOP program or the recovering program, the monitoring unit determines whether or not the recovery server is normal, and when the recovery server is not normal, the monitoring unit outputs information indicating that the recovery server is not normal.